CASCACascade Atlas

Evidence dossier

CVE-2020-9054

ZyXEL NAS products running firmware version 5.21 and earlier are vulnerable to pre-authentication command injection in weblogin.cgi

Exploited in the wild (CISA KEV since Mar 25, 2022). NVD reports CVSS 3.1 9.8. EPSS estimates 100.0% exploit likelihood as of Oct 14, 2026.

84.5–97.5Priority evidence range
Evidence through Oct 22, 2026, 6:07 PM UTC

As of Oct 22, 2026

Normalized restatement

Multiple ZyXEL network-attached storage (NAS) devices running firmware version 5.21 contain a pre-authentication command injection vulnerability, which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable device. ZyXEL NAS devices achieve authentication by using the weblogin.cgi CGI executable. This program fails to properly sanitize the username parameter that is passed to it. If the username parameter contains certain characters, it can allow command injection with the privileges of the web server that runs on the ZyXEL device. Although the web server does not run as the root user, ZyXEL devices include a setuid utility that can be leveraged to run any command with root privileges. As such, it should be assumed that exploitation of this vulnerability can lead to remote code execution with root privileges. By sending a specially-crafted HTTP POST or GET request to a vulnerable ZyXEL device, a remote, unauthenticated attacker may be able to execute arbitrary code on the device. This may happen by directly connecting to a device if it is directly exposed to an attacker. However, there are ways to trigger such crafted requests even if an attacker does not have direct connectivity to a vulnerable devices. For example, simply visiting a website can result in the compromise of any ZyXEL device that is reachable from the client system. Affected products include: NAS326 before firmware V5.21(AAZF.7)C0 NAS520 before firmware V5.21(AASZ.3)C0 NAS540 before firmware V5.21(AATB.4)C0 NAS542 before firmware V5.21(ABAG.4)C0 ZyXEL has made firmware updates available for NAS326, NAS520, NAS540, and NAS542 devices. Affected models that are end-of-support: NSA210, NSA220, NSA220+, NSA221, NSA310, NSA310S, NSA320, NSA320S, NSA325 and NSA325v2

State
PUBLISHED
Published
Mar 4, 2020
Updated
Oct 7, 2026
Evidence coverage
85%

Evidence chronology

What was known when

Download this view's receipt →
  1. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Zyxel Multiple NAS Devices OS Command Injection Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Zyxel Multiple NAS Devices OS Command Injection Vulnerability
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    certcc

    Record text: ZyXEL NAS products running firmware version 5.21 and earlier are vulnerable to pre-authentication command injection in weblogin.cgi

    Inspect raw assertion
    Field
    container
    Value
    ZyXEL NAS products running firmware version 5.21 and earlier are vulnerable to pre-authentication command injection in weblogin.cgi
    Original evidence ↗
  3. 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 ↗
  4. 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 ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 99.99% probability · 99.99th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.999880000000; percentile 0.999850000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Mar 25, 2022 · first observed Sep 1, 2026

Exploit likelihood99.99%

FIRST EPSS · score date Oct 14, 2026 · 100th percentile · first observed Oct 15, 2026

SeverityCVSS 9.8

NVD · CVSS 3.1 · first observed Oct 8, 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 statusLast verified source snapshot retained

The last verified source boundary remains in force for this claim.

Revision
evidence-policy-v1.1.0
Cutoff
Oct 22, 2026
Resolution
Review source contract
Exploit likelihoodEvidence supported

Eligible evidence is present for this bounded claim.

Revision
evidence-policy-v1.1.0
Cutoff
Oct 22, 2026
Resolution
None
Severity assessmentEvidence supported

Eligible evidence is present for this bounded claim.

Revision
casca-direct-cvss-eligibility-v1
Cutoff
Oct 22, 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
Oct 22, 2026
Resolution
Resolve identity

Source comparison

Who said what

CISA KEVOriginal assertion
Exploitation cataloged

Zyxel Multiple NAS Devices OS Command Injection Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Zyxel Multiple NAS Devices OS Command Injection Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
certccOriginal assertion
Record text

ZyXEL NAS products running firmware version 5.21 and earlier are vulnerable to pre-authentication command injection in weblogin.cgi

Inspect raw assertion
Field
container
Value
ZyXEL NAS products running firmware version 5.21 and earlier are vulnerable to pre-authentication command injection in weblogin.cgi
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
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 ↗
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 ↗
FIRST EPSSOriginal assertion
EPSS score

99.99% probability · 99.99th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.999880000000; percentile 0.999850000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
54Underlying assertions
54Canonical products
27Target assertions
27Constraint assertions

Grouped from 54 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

67 scope groups

certcc · source assertedZyXELNAS326Direct source scope
Affected: V5.21(AAZF.7)C0 through V5.21(AAZF.7)C0 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "V5.21(AAZF.7)C0", "versionType": "custom", "lessThanOrEqual": "V5.21(AAZF.7)C0"}]
certcc · source assertedZyXELNAS520Direct source scope
Affected: V5.21(AASZ.3)C0 through V5.21(AASZ.3)C0 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "V5.21(AASZ.3)C0", "versionType": "custom", "lessThanOrEqual": "V5.21(AASZ.3)C0"}]
certcc · source assertedZyXELNAS540Direct source scope
Affected: V5.21(AATB.4)C0 through V5.21(AATB.4)C0 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "V5.21(AATB.4)C0", "versionType": "custom", "lessThanOrEqual": "V5.21(AATB.4)C0"}]
certcc · source assertedZyXELNAS542Direct source scope
Affected: V5.21(ABAG.4)C0 through V5.21(ABAG.4)C0 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "V5.21(ABAG.4)C0", "versionType": "custom", "lessThanOrEqual": "V5.21(ABAG.4)C0"}]
certcc · source assertedZyXELNSA210Direct source scope
Affected: all
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "all"}]
certcc · source assertedZyXELNSA220Direct source scope
Affected: all
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "all"}]
certcc · source assertedZyXELNSA220+Direct source scope
Affected: all
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "all"}]
certcc · source assertedZyXELNSA221Direct source scope
Affected: all
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "all"}]
certcc · source assertedZyXELNSA310Direct source scope
Affected: V4.75(AALH.2)C0 through V4.75(AALH.2)C0 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "V4.75(AALH.2)C0", "versionType": "custom", "lessThanOrEqual": "V4.75(AALH.2)C0"}]
certcc · source assertedZyXELNSA320Direct source scope
Affected: all
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "all"}]
certcc · source assertedZyXELNSA320SDirect source scope
Affected: V4.75(AANV.2)C0 through V4.75(AANV.2)C0 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "V4.75(AANV.2)C0", "versionType": "custom", "lessThanOrEqual": "V4.75(AANV.2)C0"}]
certcc · source assertedZyXELNSA325Direct source scope
Affected: V4.81(AAAJ.1)C0 through V4.81(AAAJ.1)C0 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "V4.81(AAAJ.1)C0", "versionType": "custom", "lessThanOrEqual": "V4.81(AAAJ.1)C0"}]
certcc · source assertedZyXELNSA325v2Direct source scope
Affected: V4.81(AALS.1)C0 through V4.81(AALS.1)C0 (custom comparison)
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "V4.81(AALS.1)C0", "versionType": "custom", "lessThanOrEqual": "V4.81(AALS.1)C0"}]
NVD CPE · HARDWAREzyxelatp100Environmental constraint · 1 assertions
Version not applicableCanonical identity product-1200899350c6986d5c964f597f369618d1abb63616766a4ba3ec511b2ebc27e6Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:zyxel:atp100:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    4 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    7f7654a1-3806-41c7-82d4-46b0cd7ee53b
NVD CPE · OPERATING SYSTEMzyxelatp100_firmwareVulnerable target · 1 assertions
Any version (unconstrained) (>= 4.35, < 4.35\(abps.3\)c0)Canonical identity product-a61d6943c1bad48e17a6899eb15990b4a194af3c4c7456d58636c745ce6c0123Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:zyxel:atp100_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    4 · node/0 · match 0
    Logic
    OR
    Version bounds
    from including 4.35; through excluding 4.35\(abps.3\)c0
    Match ID
    1b482f4e-6e1b-45bd-a114-c389e2cd7542
NVD CPE · HARDWAREzyxelatp200Environmental constraint · 1 assertions
Version not applicableCanonical identity product-204c039ba605ff99a732d4aeb892002d51199a5a7289e8fc9a6195251cd09d02Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:zyxel:atp200:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    5 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    d68a36ff-8caf-401c-9f18-94f3a2405cf4
NVD CPE · OPERATING SYSTEMzyxelatp200_firmwareVulnerable target · 1 assertions
Any version (unconstrained) (>= 4.35, < 4.35\(abfw.3\)c0)Canonical identity product-d262d95a9d2b47c5c7875f791f3c6fa9d5d2b48a0a40750bed16cd94cd692f89Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:zyxel:atp200_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    5 · node/0 · match 0
    Logic
    OR
    Version bounds
    from including 4.35; through excluding 4.35\(abfw.3\)c0
    Match ID
    0de3ad47-1c82-4b8b-87f4-e545a7dafe5c
NVD CPE · HARDWAREzyxelatp500Environmental constraint · 1 assertions
Version not applicableCanonical identity product-2aadc23472d0134ca1a46a96d237076a2f79c52ee591e309a631af2c09fe5858Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:zyxel:atp500:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    6 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    2818e8ac-ffee-4df9-bf3f-c75166c0e851
NVD CPE · OPERATING SYSTEMzyxelatp500_firmwareVulnerable target · 1 assertions
Any version (unconstrained) (>= 4.35, < 4.35\(abfu.3\)c0)Canonical identity product-51aff2d0b03d80e26b46d437c992b29e60a2d3fc16c8471fd199c9d23383d177Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:zyxel:atp500_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    6 · node/0 · match 0
    Logic
    OR
    Version bounds
    from including 4.35; through excluding 4.35\(abfu.3\)c0
    Match ID
    352e7f31-76db-4786-bcc0-e11f43550eb1
NVD CPE · HARDWAREzyxelatp800Environmental constraint · 1 assertions
Version not applicableCanonical identity product-3d53771a3239415f970ae3ae39ad7aea35c319c755ea6e942a0f4add01901eb2Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:zyxel:atp800:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    7 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    66b99746-0589-46e6-9cbd-f38619ad97dc
NVD CPE · OPERATING SYSTEMzyxelatp800_firmwareVulnerable target · 1 assertions
Any version (unconstrained) (>= 4.35, < 4.35\(abiq.3\)c0)Canonical identity product-c0379851b411c8239197abf9661f20e966d7560c151b11c7647d2508bf2f7e92Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:zyxel:atp800_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    7 · node/0 · match 0
    Logic
    OR
    Version bounds
    from including 4.35; through excluding 4.35\(abiq.3\)c0
    Match ID
    92e70f0c-d446-47b2-809b-d4680daf13fc
NVD CPE · HARDWAREzyxelnas326Environmental constraint · 1 assertions
Version not applicableCanonical identity product-bf651576568acdfc3dc579a4c64a0bb9783eea91458acad62e03f3146266c057Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:zyxel:nas326:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    0 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    e0a01b19-4a91-4fbc-8447-2e854346dac5
NVD CPE · OPERATING SYSTEMzyxelnas326_firmwareVulnerable target · 1 assertions
Any version (unconstrained) (< 5.21\(aazf.7\)c0)Canonical identity product-c6d151a93544cac337f2464ac0dcf433ddb4169e8f873baebe945aa6876f626fLinked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:zyxel:nas326_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 5.21\(aazf.7\)c0
    Match ID
    3fec76ca-9f2c-4a44-93c5-c131e68b9a5e
NVD CPE · HARDWAREzyxelnas520Environmental constraint · 1 assertions
Version not applicableCanonical identity product-35aa25863059be198d815b4191ddcbecc5c9faebec7d329d13d1a4afec376ca9Linked exact
Scope constrained
Inspect raw assertion
  1. cpe:2.3:h:zyxel:nas520:-:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Environmental constraint
    Configuration
    1 · node/1 · match 0
    Logic
    OR
    Version bounds
    No explicit bounds
    Match ID
    07b2ba3d-40f0-4d59-8838-b226faabf27e
NVD CPE · OPERATING SYSTEMzyxelnas520_firmwareVulnerable target · 1 assertions
Any version (unconstrained) (< 5.21\(aasz.3\)c0)Canonical identity product-f1675b9b0874b48540284abb85b542e61f236452e9a35f7dc23304a5b6c787b3Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:zyxel:nas520_firmware:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    1 · node/0 · match 0
    Logic
    OR
    Version bounds
    through excluding 5.21\(aasz.3\)c0
    Match ID
    09de98e7-ce8e-4f45-9f1e-4a4345fbd443

Affected-product evidence

Accepted scope and product mapping

0 canonical links · 2 source-reported links

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
13
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
08e7a657-34e1-4c4f-abda-d45ddf1c2db00bcd5344-1fcc-4697-a0d0-4138ebcb316b23b73a61-e7be-4d6f-b4e5-c9e6fd85684d4553e39c-c44b-4884-a89d-c930590ca67b7fd921e7-e588-4ead-b4ce-c7df972cd8ae96d076ef-7ea1-43c0-9cd9-3f0d334a9fa9990c04e0-a42e-46e9-8f7a-8dae9c0cf78d9def8cc3-9251-468f-a015-b4139ac08fb7a61eb1e1-e9d7-4fbc-a147-b15bf743d971b6573868-58d9-45c2-bfce-96afa28a55dcbbe87894-df28-457b-990e-2eab866a1f9fe74ea9fd-4e09-4647-a33f-ccfbae3461d1fbc4fcba-928d-4184-ac85-b1fab1c78dcc
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
Nvd cpe vulnerable target
Assertions
27
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Oct 22, 2026
Retained assertion IDs
04004d19-326a-476c-b506-d32d93d1938b04dcf8f0-9337-4d85-ba0b-0222a4bd0bc60ac0bafe-3433-4c87-ab9c-661aa83ec9d40d3cc148-a29e-469b-bcb0-e3a80aa9eb8e13668c02-9cf6-4755-bb7c-17c805ef2fc923da688d-a959-4c5d-aef2-217f0fd0aa5a24092f94-6305-4ae3-ac7a-c4ba48e9c06c25d32950-8f5e-4427-be15-5f3e091457dd2a59500c-ae49-411e-8e58-b633a57bf01035249017-6ecb-4588-b65a-799a5ae9c03336c0d061-c342-4a2a-95cd-e3da26c8d68c450a7eab-5433-424e-ba7b-961a7fc5f41f4bdec80e-d2ef-41b3-af85-a7a5918d86604e6f1aaa-f353-46be-ab03-13c6cb3609575f415ee0-3323-48f2-9d81-e217a90cd84a6da6dfa7-c29d-4684-8bb8-cc8dcb75a9f271ba64e8-b9a2-4f7f-888b-408ad0c9b14f8c5a12dd-04de-4322-ba79-3e412942e63f900239da-397f-4e4a-be8a-fe1ccf94c53592d4ca37-bcfa-4760-91dd-2f222cb7b1b6996bd236-885b-4002-83d4-16b75d0f45abb2a5eb11-5c60-4d8d-a5ae-687483deae1bca41ed34-077f-4497-bd3a-898e771c59a7d5762d67-7462-4465-a383-f2f1a34cefecd58fe739-b3a4-4b3b-9ff3-bd23c207408ed6489439-16b0-42f6-8914-9afe42d096f3e29dea81-81fd-45c4-9ebf-b4973311b5ec

Assessments

CVSS by origin

9.8
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
10.0
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:N/C:C/I:C/A:C
9.8
CVE Program sourceCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8
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:H/I:H/A:H

Direct CVE/CNA normalized decisions

9.8Priority 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:H/I:H/A:H
Validation
Valid match
Recomputed
9.8
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.