CASCACascade Atlas

Evidence dossier

CVE-2018-0159

A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated,…

Exploited in the wild (CISA KEV since Mar 3, 2022). NVD reports CVSS 3.1 7.5. EPSS estimates 6.9% exploit likelihood as of Aug 27, 2026.

67.5–68.8Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.

State
PUBLISHED
Published
Mar 28, 2018
Updated
Jan 12, 2026
Evidence coverage
95%

Evidence chronology

What was known when

Download this view's receipt →
  1. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    cisco

    Record text: A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.

    Inspect raw assertion
    Field
    container
    Value
    A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    CVE Program

    Record text: CVE Program Container

    Inspect raw assertion
    Field
    container
    Value
    CVE Program Container
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 6.92% probability · 93.6th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.069150000000; percentile 0.936000000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Mar 3, 2022 · first observed Jul 19, 2026

Exploit likelihood6.92%

FIRST EPSS · score date Aug 27, 2026 · 93.6th percentile · first observed Aug 27, 2026

SeverityCVSS 7.5

NVD · CVSS 3.1 · first observed Jul 19, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

casca-unknown-reasons-v1
Exploitation statusEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Aug 27, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Aug 27, 2026
Resolution
None
Affected productsSource-reported scope

The cited source assertion is retained while canonical product linkage remains open.

Revision
casca-factor-d-obligations-v1
Cutoff
Aug 27, 2026
Resolution
Resolve identity

Source comparison

Who said what

CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
ciscoOriginal assertion
Record text

A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.

Inspect raw assertion
Field
container
Value
A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CVE ProgramDerivative copy
Record text

CVE Program Container

Inspect raw assertion
Field
container
Value
CVE Program Container
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
CISA KEVOriginal assertion
Exploitation cataloged

Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Cisco IOS and XE Software Internet Key Exchange Version 1 Denial-of-Service Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

6.92% probability · 93.6th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.069150000000; percentile 0.936000000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
26Underlying assertions
14Canonical products
2Target assertions
24Constraint assertions

Grouped from 4 configuration nodes in this exact snapshot. Visual grouping is navigational; asset exposure and root cause require cited evidence.

Identity source boundaries
  • Cpe dictionary1,775,266 records · observed through 2026-07-21T06:45:29.809Z27d65b0f-b718-4b4f-bb79-c47c68d09dfa
  • Cpe match643,502 records · observed through 2026-07-21T08:13:17.697Z955dae73-7302-438b-aee1-058d7cc5d48e

15 scope groups

cisco · source assertedn/aCisco IOS and IOS XEDirect source scope
Affected: Cisco IOS and IOS XE
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "Cisco IOS and IOS XE"}]
NVD CPE · HARDWAREciscoasr_901-12c-f-dEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-545af6c3e16300146e4519beb8dddb4a2dbe4a1ae3160d73aef813603edac62dLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:asr_901-12c-f-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    d6279a69-2f9d-4cd9-9c19-62e701c3c4f9
  2. cpe:2.3:h:cisco:asr_901-12c-f-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    d6279a69-2f9d-4cd9-9c19-62e701c3c4f9
NVD CPE · HARDWAREciscoasr_901-12c-ft-dEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-8ece9307ecba1748950614b56e55ebcc9de38632fbb7db7290bb3255e878d42dLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:asr_901-12c-ft-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    a46bb1e3-d813-4c19-81fa-96b8ef3e2f7b
  2. cpe:2.3:h:cisco:asr_901-12c-ft-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 1
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    a46bb1e3-d813-4c19-81fa-96b8ef3e2f7b
NVD CPE · HARDWAREciscoasr_901-4c-f-dEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-c59fc0fce22bf942525c80bc960b07cd8591fbc24165e95457d9ef3e7d134ba1Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:asr_901-4c-f-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    64e9ccc6-ca54-44c4-9a41-d2ca3a25be8c
  2. cpe:2.3:h:cisco:asr_901-4c-f-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 2
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    64e9ccc6-ca54-44c4-9a41-d2ca3a25be8c
NVD CPE · HARDWAREciscoasr_901-4c-ft-dEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-f4ef0aeab0566a7358498326034a56a4d31085762dc2ea127b02a835f4ca2523Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:asr_901-4c-ft-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    bc4e0cc8-9c67-4eb0-97a1-baefc6e9708a
  2. cpe:2.3:h:cisco:asr_901-4c-ft-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 3
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    bc4e0cc8-9c67-4eb0-97a1-baefc6e9708a
NVD CPE · HARDWAREciscoasr_901-6cz-f-aEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-a00855a08f18c281135c154f689e5becd8a7eb1abc62709ec42791c9681a5407Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:asr_901-6cz-f-a:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ddb1a95c-8513-4cc7-8cdf-012b212ff02f
  2. cpe:2.3:h:cisco:asr_901-6cz-f-a:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 4
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ddb1a95c-8513-4cc7-8cdf-012b212ff02f
NVD CPE · HARDWAREciscoasr_901-6cz-f-dEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-a947fee277ea5671e60105ff4aa0baf42c2f21d3fb2e01bbefd7e4f16a146677Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:asr_901-6cz-f-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ae761b1c-d749-4e1b-9a4a-7f41d1df9c8c
  2. cpe:2.3:h:cisco:asr_901-6cz-f-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 5
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ae761b1c-d749-4e1b-9a4a-7f41d1df9c8c
NVD CPE · HARDWAREciscoasr_901-6cz-ft-aEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-e4c286ca24b59b906281c666cc360203301c6eee44a4238e305e67ea1c4e5172Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:asr_901-6cz-ft-a:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    6c2a515c-797d-47ee-8051-f3fbe417bce9
  2. cpe:2.3:h:cisco:asr_901-6cz-ft-a:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 6
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    6c2a515c-797d-47ee-8051-f3fbe417bce9
NVD CPE · HARDWAREciscoasr_901-6cz-ft-dEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-2236b0b392c9fca244c77c2b095749882713dfe387f8b3003f07c5ae73f0a278Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:asr_901-6cz-ft-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 7
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    e673a75f-eff8-4591-8e0f-a21083563dba
  2. cpe:2.3:h:cisco:asr_901-6cz-ft-d:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 7
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    e673a75f-eff8-4591-8e0f-a21083563dba
NVD CPE · OPERATING SYSTEMciscoiosVulnerable target · 1 assertions
Version 15.3(3)sCanonical identity product-5972f4392170d0d1b4e75a10eb3b383835ead601c8d9b09329525407a4e1471aLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:cisco:ios:15.3\(3\)s:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ab84ce04-f2d0-4a37-b2ba-25126d1824d8
NVD CPE · OPERATING SYSTEMciscoios_xeVulnerable target · 1 assertions
Version 15.3(3)sCanonical identity product-cc06181059d0f387414dd5737700c03a38fe93d65d4a541ac9744a37c25c9f59Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:cisco:ios_xe:15.3\(3\)s:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    abe8d4e6-7906-4680-a1df-71ff3d43716f
NVD CPE · HARDWAREciscome_3600x-24cx-mEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-bc503bc6380d4be0b2d7328283d1494f6eb6595a845a1460cd7b343f75c65c33Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:me_3600x-24cx-m:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 8
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c03d362e-8431-46d9-a214-9bf421299095
  2. cpe:2.3:h:cisco:me_3600x-24cx-m:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 8
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    c03d362e-8431-46d9-a214-9bf421299095
NVD CPE · HARDWAREciscome_3600x-24fs-mEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-473c1071c7f3eba62877d10662d91313d7b0bd5f57d744916bd005f948d0209cLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:me_3600x-24fs-m:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 9
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3d49393a-23b1-4b8a-8057-ba08745c9764
  2. cpe:2.3:h:cisco:me_3600x-24fs-m:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 9
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    3d49393a-23b1-4b8a-8057-ba08745c9764
NVD CPE · HARDWAREciscome_3600x-24ts-mEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-aaeaee54828bd3870b3b0259d3c120ae74286df65d6314a00dc67c1414e8f75fLinked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:me_3600x-24ts-m:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 10
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    0fd4e0ea-5f54-4916-b379-5fda231bc6a7
  2. cpe:2.3:h:cisco:me_3600x-24ts-m:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 10
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    0fd4e0ea-5f54-4916-b379-5fda231bc6a7
NVD CPE · HARDWAREciscome_3800x-24fs-mEnvironmental constraint · 2 assertions
Version not applicableCanonical identity product-cff6982769c1af3f3ce5b63c3a0dc7f44129f8459be44773b1c946dc4479f363Linked exact
Scope constrained
Inspect raw assertions
  1. cpe:2.3:h:cisco:me_3800x-24fs-m:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 11
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ba69bc08-9866-4b72-8491-a8e3ffcef541
  2. cpe:2.3:h:cisco:me_3800x-24fs-m:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 11
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    ba69bc08-9866-4b72-8491-a8e3ffcef541

Affected-product evidence

Accepted scope and product mapping

2 canonical links · 1 source-reported links

Mapping establishedEvidence supported

vendor-0774b265c0e837e737aaf99ed0f2450c048e61f34267ca59d8623878b839334e · product-5972f4392170d0d1b4e75a10eb3b383835ead601c8d9b09329525407a4e1471a

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
745a5c4e-aa49-47f1-b062-f795a5fb4363
Mapping establishedEvidence supported

vendor-0774b265c0e837e737aaf99ed0f2450c048e61f34267ca59d8623878b839334e · product-cc06181059d0f387414dd5737700c03a38fe93d65d4a541ac9744a37c25c9f59

Source class
Nvd cpe vulnerable target
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
5b70691b-f7e6-444a-8e4c-3b108a121c94
Source-reported scopeSource-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Vendor specified only by source · Product specified only by source

Source class
Direct cve affected
Assertions
1
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
07f384c8-c37e-4761-bf16-9d4eae95ec18

Assessments

CVSS by origin

7.5
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.8
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:N/C:N/I:N/A:C
7.5
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
7.5
CISA-ADPCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Direct CVE/CNA normalized decisions

7.5Priority eligible

CISA-ADP

CVSS 3.1 · Secondary · Independent enrichment · rank 2

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Validation
Valid match
Recomputed
7.5
Decision reason
Evidence supported
Policy
casca-direct-cvss-eligibility-v1

Assessments are retained side by side under closed precedence. Cascade never averages CVSS.

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.