CASCACascade Atlas

Evidence dossier

CVE-2017-6742

A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code.

Exploited in the wild (CISA KEV since Apr 19, 2023). NVD reports CVSS 3.1 8.8. EPSS estimates 21.4% exploit likelihood as of Aug 27, 2026.

74.8–77.0Priority evidence range
Evidence current through Aug 27, 2026, 6:09 PM UTC

As of Aug 27, 2026

Normalized restatement

A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.

State
PUBLISHED
Published
Jul 17, 2017
Updated
Jan 12, 2026
Evidence coverage
94%

Evidence chronology

What was known when

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  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 SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.

    Inspect raw assertion
    Field
    container
    Value
    A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.
    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 IOS XE Software SNMP Remote Code Execution Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability
    Original evidence ↗
  5. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 21.42% probability · 97.43th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.214240000000; percentile 0.974250000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Apr 19, 2023 · first observed Jul 19, 2026

Exploit likelihood21.42%

FIRST EPSS · score date Aug 27, 2026 · 97.4th percentile · first observed Aug 27, 2026

SeverityCVSS 8.8

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 SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.

Inspect raw assertion
Field
container
Value
A vulnerability in the SNMP implementation of could allow an authenticated, remote attacker to cause a reload of the affected system or to remotely execute code. An attacker could exploit this vulnerability by sending a crafted SNMP packet to the affected device.  The vulnerability is due to a buffer overflow in the affected code area. The vulnerability affects all versions of SNMP (versions 1, 2c, and 3). The attacker must know the SNMP read only community string (SNMP version 2c or earlier) or the user credentials (SNMPv3). An exploit could allow the attacker to execute arbitrary code and obtain full control of the system or to cause a reload of the affected system. Only traffic directed to the affected system can be used to exploit this vulnerability.
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 IOS XE Software SNMP Remote Code Execution Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Cisco IOS and IOS XE Software SNMP Remote Code Execution Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

21.42% probability · 97.43th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.214240000000; percentile 0.974250000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →
3Underlying assertions
2Canonical products
3Target assertions
0Constraint assertions

Grouped from 1 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

4 scope groups

cisco · source assertedCiscoCisco IOS XE SoftwareDirect source scope
Affected: 3.7.0SAffected: 3.7.1SAffected: 3.7.2SAffected: 3.7.3SAffected: 3.7.4SAffected: 3.7.5SAffected: 3.7.6SAffected: 3.7.7SAffected: 3.7.4aSAffected: 3.7.2tSAffected: 3.7.0bSAffected: 3.8.0SAffected: 3.8.1SAffected: 3.8.2SAffected: 3.9.1SAffected: 3.9.0SAffected: 3.9.2SAffected: 3.9.0aSAffected: 3.11.1SAffected: 3.11.2SAffected: 3.11.0SAffected: 3.11.3SAffected: 3.11.4SAffected: 3.12.0SAffected: 3.12.1SAffected: 3.12.2SAffected: 3.12.3SAffected: 3.12.0aSAffected: 3.12.4SAffected: 3.13.0SAffected: 3.13.1SAffected: 3.13.2SAffected: 3.13.3SAffected: 3.13.4SAffected: 3.13.5SAffected: 3.13.2aSAffected: 3.13.0aSAffected: 3.13.5aSAffected: 3.13.6SAffected: 3.13.7SAffected: 3.13.6aSAffected: 3.13.7aSAffected: 3.6.3EAffected: 3.6.6EAffected: 3.6.5bEAffected: 3.14.0SAffected: 3.14.1SAffected: 3.14.2SAffected: 3.14.3SAffected: 3.14.4SAffected: 3.15.0SAffected: 3.15.1SAffected: 3.15.2SAffected: 3.15.1cSAffected: 3.15.3SAffected: 3.15.4SAffected: 3.7.4EAffected: 3.7.5EAffected: 3.16.0SAffected: 3.16.1SAffected: 3.16.1aSAffected: 3.16.2SAffected: 3.16.0cSAffected: 3.16.3SAffected: 3.16.2bSAffected: 3.16.4aSAffected: 3.16.4bSAffected: 3.16.5SAffected: 3.16.4dSAffected: 3.17.0SAffected: 3.17.1SAffected: 3.17.2SAffected: 3.17.1aSAffected: 3.17.3SAffected: 16.2.1Affected: 16.2.2Affected: 16.3.1Affected: 16.3.2Affected: 16.3.3Affected: 16.3.1aAffected: 16.3.4Affected: 16.4.1Affected: 16.4.2Affected: 16.5.1Affected: 16.5.1bAffected: 3.18.0aSAffected: 3.18.0SAffected: 3.18.1SAffected: 3.18.0SPAffected: 3.18.1SPAffected: 3.18.1aSPAffected: 3.18.2aSP
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "3.7.0S"}, {"status": "affected", "version": "3.7.1S"}, {"status": "affected", "version": "3.7.2S"}, {"status": "affected", "version": "3.7.3S"}, {"status": "affected", "version": "3.7.4S"}, {"status": "affected", "version": "3.7.5S"}, {"status": "affected", "version": "3.7.6S"}, {"status": "affected", "version": "3.7.7S"}, {"status": "affected", "version": "3.7.4aS"}, {"status": "affected", "version": "3.7.2tS"}, {"status": "affected", "version": "3.7.0bS"}, {"status": "affected", "version": "3.8.0S"}, {"status": "affected", "version": "3.8.1S"}, {"status": "affected", "version": "3.8.2S"}, {"status": "affected", "version": "3.9.1S"}, {"status": "affected", "version": "3.9.0S"}, {"status": "affected", "version": "3.9.2S"}, {"status": "affected", "version": "3.9.0aS"}, {"status": "affected", "version": "3.11.1S"}, {"status": "affected", "version": "3.11.2S"}, {"status": "affected", "version": "3.11.0S"}, {"status": "affected", "version": "3.11.3S"}, {"status": "affected", "version": "3.11.4S"}, {"status": "affected", "version": "3.12.0S"}, {"status": "affected", "version": "3.12.1S"}, {"status": "affected", "version": "3.12.2S"}, {"status": "affected", "version": "3.12.3S"}, {"status": "affected", "version": "3.12.0aS"}, {"status": "affected", "version": "3.12.4S"}, {"status": "affected", "version": "3.13.0S"}, {"status": "affected", "version": "3.13.1S"}, {"status": "affected", "version": "3.13.2S"}, {"status": "affected", "version": "3.13.3S"}, {"status": "affected", "version": "3.13.4S"}, {"status": "affected", "version": "3.13.5S"}, {"status": "affected", "version": "3.13.2aS"}, {"status": "affected", "version": "3.13.0aS"}, {"status": "affected", "version": "3.13.5aS"}, {"status": "affected", "version": "3.13.6S"}, {"status": "affected", "version": "3.13.7S"}, {"status": "affected", "version": "3.13.6aS"}, {"status": "affected", "version": "3.13.7aS"}, {"status": "affected", "version": "3.6.3E"}, {"status": "affected", "version": "3.6.6E"}, {"status": "affected", "version": "3.6.5bE"}, {"status": "affected", "version": "3.14.0S"}, {"status": "affected", "version": "3.14.1S"}, {"status": "affected", "version": "3.14.2S"}, {"status": "affected", "version": "3.14.3S"}, {"status": "affected", "version": "3.14.4S"}, {"status": "affected", "version": "3.15.0S"}, {"status": "affected", "version": "3.15.1S"}, {"status": "affected", "version": "3.15.2S"}, {"status": "affected", "version": "3.15.1cS"}, {"status": "affected", "version": "3.15.3S"}, {"status": "affected", "version": "3.15.4S"}, {"status": "affected", "version": "3.7.4E"}, {"status": "affected", "version": "3.7.5E"}, {"status": "affected", "version": "3.16.0S"}, {"status": "affected", "version": "3.16.1S"}, {"status": "affected", "version": "3.16.1aS"}, {"status": "affected", "version": "3.16.2S"}, {"status": "affected", "version": "3.16.0cS"}, {"status": "affected", "version": "3.16.3S"}, {"status": "affected", "version": "3.16.2bS"}, {"status": "affected", "version": "3.16.4aS"}, {"status": "affected", "version": "3.16.4bS"}, {"status": "affected", "version": "3.16.5S"}, {"status": "affected", "version": "3.16.4dS"}, {"status": "affected", "version": "3.17.0S"}, {"status": "affected", "version": "3.17.1S"}, {"status": "affected", "version": "3.17.2S"}, {"status": "affected", "version": "3.17.1aS"}, {"status": "affected", "version": "3.17.3S"}, {"status": "affected", "version": "16.2.1"}, {"status": "affected", "version": "16.2.2"}, {"status": "affected", "version": "16.3.1"}, {"status": "affected", "version": "16.3.2"}, {"status": "affected", "version": "16.3.3"}, {"status": "affected", "version": "16.3.1a"}, {"status": "affected", "version": "16.3.4"}, {"status": "affected", "version": "16.4.1"}, {"status": "affected", "version": "16.4.2"}, {"status": "affected", "version": "16.5.1"}, {"status": "affected", "version": "16.5.1b"}, {"status": "affected", "version": "3.18.0aS"}, {"status": "affected", "version": "3.18.0S"}, {"status": "affected", "version": "3.18.1S"}, {"status": "affected", "version": "3.18.0SP"}, {"status": "affected", "version": "3.18.1SP"}, {"status": "affected", "version": "3.18.1aSP"}, {"status": "affected", "version": "3.18.2aSP"}]
cisco · source assertedIntelliShieldUniversal ProductDirect source scope
Affected: N/A
Source-reported scope

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

Inspect raw assertion[{"status": "affected", "version": "N/A"}]
NVD CPE · OPERATING SYSTEMciscoiosVulnerable target · 2 assertions
Any version (unconstrained) (>= 12.0, <= 12.4); Any version (unconstrained) (>= 15.0, <= 15.6)Canonical identity product-5972f4392170d0d1b4e75a10eb3b383835ead601c8d9b09329525407a4e1471aLinked exact
Scope supported
Inspect raw assertions
  1. cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 0
    Logic
    OR
    Version bounds
    from including 12.0; through including 12.4
    Match ID
    63acd7db-dcfe-4cdb-a3f0-4e413e178315
  2. cpe:2.3:o:cisco:ios:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 1
    Logic
    OR
    Version bounds
    from including 15.0; through including 15.6
    Match ID
    650eb42c-d85f-482b-972d-7dcac210dc48
NVD CPE · OPERATING SYSTEMciscoios_xeVulnerable target · 1 assertions
Any version (unconstrained) (>= 2.2.0, <= 3.17)Canonical identity product-cc06181059d0f387414dd5737700c03a38fe93d65d4a541ac9744a37c25c9f59Linked exact
Scope supported
Inspect raw assertion
  1. cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*
    Official link
    Linked exact
    Role
    Vulnerable target
    Configuration
    0 · node/0 · match 2
    Logic
    OR
    Version bounds
    from including 2.2.0; through including 3.17
    Match ID
    61e68edc-8a69-446c-922a-57a6186786a8

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
2
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
238b379b-ae92-4ae7-8ca6-6adffa78d8245b2e1008-7d43-4ccc-be5e-b74bd381d9bc
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
c3febcf9-e6b7-4b14-b146-c69064fc5b12
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
2
Mapping revision
cpe23-exact-mapping-v1
Observed cutoff
Aug 27, 2026
Retained assertion IDs
1939dd88-3576-4320-9605-721edd4961742142f18f-b5b7-4d53-b3f3-e583f0734b6b

Assessments

CVSS by origin

8.8
NVDCVSS 3.1 · role Primary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
9.0
NVDCVSS 2.0 · role Primary · priority eligiblevalid_matchAV:N/AC:L/Au:S/C:C/I:C/A:C
8.8
psirt@cisco.comCVSS 3.0 · role Secondary · priority eligiblevalid_matchCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
8.8
ciscoCVSS 3.0 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Direct CVE/CNA normalized decisions

8.8Priority eligible

cisco

CVSS 3.0 · Primary · Original assertion · rank 1

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Validation
Valid match
Recomputed
8.8
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.