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TI-2024-13306 Aliases CVE-2024-20373GHSA-3xmf-m2fg-h94r

Cisco IOS and Cisco IOS XE SNMP Extended ACL Bypass Vulnerability

Priority LOW 31CWE-284Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · Low · None
Fix status
No fix listed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-284.

Summary

A vulnerability in the implementation of the Simple Network Management Protocol (SNMP) IPv4 access control list (ACL) feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to perform SNMP polling of an affected device, even if it is configured to deny SNMP traffic.  This vulnerability exists because Cisco IOS Software and Cisco IOS XE Software do not support extended IPv4 ACLs for SNMP, but they do allow administrators to configure extended named IPv4 ACLs that are attached to the SNMP server configuration without a warning message. This can result in no ACL being applied to the SNMP listening process. An attacker could exploit this vulnerability by performing SNMP polling of an affected device. A successful exploit could allow the attacker to perform SNMP operations that should be denied. The attacker has no control of the SNMP ACL configuration and would still need a valid SNMP version 2c (SNMPv2c) community string or SNMP version 3 (SNMPv3) user credentials. SNMP with IPv6 ACL configurations is not affected. For more information, see the section of this advisory.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.005 43rd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
CiscoCisco IOS XE Catalyst SD-WAN16.10.6; 16.12.3; 16.12.1; 16.10.4; 16.10.5; 16.12.4; 16.10.3; 16.10.3a; 16.10.3b; 16.11.1s; 16.11.1a; 16.10.1; 16.11.1f; 16.9.4; 16.9.3; 16.10.2; 16.11.1b; 16.11.1; 16.12.5; 16.11.1d—No fix listedCNA
  • Cisco IOS XE Catalyst SD-WAN VendorCisco Affected 16.10.6; 16.12.3; 16.12.1; 16.10.4; 16.10.5; 16.12.4; 16.10.3; 16.10.3a; 16.10.3b; 16.11.1s; 16.11.1a; 16.10.1; 16.11.1f; 16.9.4; 16.9.3; 16.10.2; 16.11.1b; 16.11.1; 16.12.5; 16.11.1d Fixed in — No fix listed CNA

CPE configurations NVD · 20

CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.3:*:*:*:*:*:*:*16.9.3VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.4:*:*:*:*:*:*:*16.9.4VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.1:*:*:*:*:*:*:*16.10.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.2:*:*:*:*:*:*:*16.10.2VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.3:*:*:*:*:*:*:*16.10.3VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.3a:*:*:*:*:*:*:*16.10.3aVulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.3b:*:*:*:*:*:*:*16.10.3bVulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.4:*:*:*:*:*:*:*16.10.4VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.5:*:*:*:*:*:*:*16.10.5VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.6:*:*:*:*:*:*:*16.10.6VulnerableCisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.3:*:*:*:*:*:*:* Versions 16.9.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.9.4:*:*:*:*:*:*:* Versions 16.9.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.1:*:*:*:*:*:*:* Versions 16.10.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.2:*:*:*:*:*:*:* Versions 16.10.2 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.3:*:*:*:*:*:*:* Versions 16.10.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.3a:*:*:*:*:*:*:* Versions 16.10.3a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.3b:*:*:*:*:*:*:* Versions 16.10.3b Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.4:*:*:*:*:*:*:* Versions 16.10.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.5:*:*:*:*:*:*:* Versions 16.10.5 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.10.6:*:*:*:*:*:*:* Versions 16.10.6 Vulnerable ·Cisco
Show 10 more CPE
CPEVersionsRoleVendor
cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1:*:*:*:*:*:*:*16.11.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1a:*:*:*:*:*:*:*16.11.1aVulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1b:*:*:*:*:*:*:*16.11.1bVulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1d:*:*:*:*:*:*:*16.11.1dVulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1f:*:*:*:*:*:*:*16.11.1fVulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1s:*:*:*:*:*:*:*16.11.1sVulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.12.1:*:*:*:*:*:*:*16.12.1VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.12.3:*:*:*:*:*:*:*16.12.3VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.12.4:*:*:*:*:*:*:*16.12.4VulnerableCisco
cpe:2.3:o:cisco:ios_xe_sd-wan:16.12.5:*:*:*:*:*:*:*16.12.5VulnerableCisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1:*:*:*:*:*:*:* Versions 16.11.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1a:*:*:*:*:*:*:* Versions 16.11.1a Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1b:*:*:*:*:*:*:* Versions 16.11.1b Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1d:*:*:*:*:*:*:* Versions 16.11.1d Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1f:*:*:*:*:*:*:* Versions 16.11.1f Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.11.1s:*:*:*:*:*:*:* Versions 16.11.1s Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.12.1:*:*:*:*:*:*:* Versions 16.12.1 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.12.3:*:*:*:*:*:*:* Versions 16.12.3 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.12.4:*:*:*:*:*:*:* Versions 16.12.4 Vulnerable ·Cisco
  • cpe:2.3:o:cisco:ios_xe_sd-wan:16.12.5:*:*:*:*:*:*:* Versions 16.12.5 Vulnerable ·Cisco

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2024-20373
  2. 2026-10-03 Alias added: GHSA-3xmf-m2fg-h94r

References

Advisory 1

  • TI-2025-14647 Stack-based buffer overflow in Cisco IOS KEVCVSS 3.1HIGH 7.7
  • TI-2021-01110 Cisco IOS XE SD-WAN Software Parameter Injection Vulnerabilities CVSS 3.1MEDIUM 6.7
  • TI-2020-02926 Cisco SD-WAN Solution Software Buffer Overflow Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2021-13726 Cisco IOS XE SD-WAN Software Buffer Overflow Vulnerability CVSS 3.1CRITICAL 9.8
  • TI-2021-01028 Cisco SD-WAN Buffer Overflow Vulnerabilities CVSS 3.1CRITICAL 9.8
  • TI-2021-01027 Cisco SD-WAN Buffer Overflow Vulnerabilities CVSS 3.1CRITICAL 9.8
See all 25 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences