CVE-2025-20137

MEDIUM

4.7

CVSS Score

Published: May 7, 2025 at 05:31 PM UTC

Updated: June 17, 2026 at 08:40 AM UTC

41 products affected across 1 vendorIOSCatalyst 2960L-48Ps-LlCatalyst 2960L-16Ps-Ll

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Severity

MEDIUM4.7

Exploit prediction

EPSS 0.3%

SSVC

No known exploit

Description

A vulnerability in the access control list (ACL) programming of Cisco IOS Software that is running on Cisco Catalyst 1000 Switches and Cisco Catalyst 2960L Switches could allow an unauthenticated, remote attacker to bypass a configured ACL. This vulnerability is due to the use of both an IPv4 ACL and a dynamic ACL of IP Source Guard on the same interface, which is an unsupported configuration. An attacker could exploit this vulnerability by attempting to send traffic through an affected device. A successful exploit could allow the attacker to bypass an ACL on the affected device. Note: Cisco documentation has been updated to reflect that this is an unsupported configuration. However, Cisco is publishing this advisory because the device will not prevent an administrator from configuring both features on the same interface. There are no plans to implement the ability to configure both features on the same interface on Cisco Catalyst 1000 or Catalyst 2960L Switches.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS · Cisconpm

95%

15.2(5a)E15.2(5a)e15.2(5b)E15.2(5b)e15.2(5c)E15.2(5c)e15.2(6)E15.2(6)E0c15.2(6)E115.2(6)E215.2(6)E2b15.2(6)E315.2(6)e15.2(6)e0c15.2(6)e1 15.2(6)e2 15.2(6)e2b 15.2(6)e315.2(7)E15.2(7)E0a15.2(7)E0s15.2(7)E115.2(7)E1015.2(7)E1115.2(7)E1215.2(7)E1a15.2(7)E215.2(7)E315.2(7)E3k15.2(7)E415.2(7)E515.2(7)E615.2(7)E715.2(7)E815.2(7)E915.2(7)e 15.2(7)e0a 15.2(7)e0s 15.2(7)e1 15.2(7)e10 15.2(7)e11 15.2(7)e12 15.2(7)e1a 15.2(7)e2 15.2(7)e3 15.2(7)e3k 15.2(7)e4 15.2(7)e5 15.2(7)e6 15.2(7)e7 15.2(7)e8 15.2(7)e9 15.2(7a)E0b15.2(7a)e0b15.2(7b)E0b15.2(7b)e0b15.2(8)E15.2(8)E115.2(8)E215.2(8)E315.2(8)E415.2(8)E515.2(8)E615.2(8)e 15.2(8)e1 15.2(8)e2 15.2(8)e3 15.2(8)e4 15.2(8)e5 15.2(8)e6

cisco-catalyst-1000-16fp-2g-l (environment) · cisco-catalyst-1000-16p-2g-l (environment) · cisco-catalyst-1000-16t-2g-l (environment) · cisco-catalyst-1000-16t-e-2g-l (environment) · cisco-catalyst-1000-24fp-4g-l (environment) · cisco-catalyst-1000-24fp-4x-l (environment) · cisco-catalyst-1000-24p-4g-l (environment) · cisco-catalyst-1000-24p-4x-l (environment) · cisco-catalyst-1000-24pp-4g-l (environment) · cisco-catalyst-1000-24t-4g-l (environment) · cisco-catalyst-1000-24t-4x-l (environment) · cisco-catalyst-1000-48fp-4g-l (environment) · cisco-catalyst-1000-48fp-4x-l (environment) · cisco-catalyst-1000-48p-4g-l (environment) · cisco-catalyst-1000-48p-4x-l (environment) · cisco-catalyst-1000-48pp-4g-l (environment) · cisco-catalyst-1000-48t-4g-l (environment) · cisco-catalyst-1000-48t-4x-l (environment) · cisco-catalyst-1000-8fp-2g-l (environment) · cisco-catalyst-1000-8fp-e-2g-l (environment) · cisco-catalyst-1000-8p-2g-l (environment) · cisco-catalyst-1000-8p-e-2g-l (environment) · cisco-catalyst-1000-8t-2g-l (environment) · cisco-catalyst-1000-8t-e-2g-l (environment) · cisco-catalyst-1000fe-24p-4g-l (environment) · cisco-catalyst-1000fe-24t-4g-l (environment) · cisco-catalyst-1000fe-48p-4g-l (environment) · cisco-catalyst-1000fe-48t-4g-l (environment) · cisco-catalyst-2960l-16ps-ll (environment) · cisco-catalyst-2960l-16ts-ll (environment) · cisco-catalyst-2960l-24pq-ll (environment) · cisco-catalyst-2960l-24ps-ll (environment) · cisco-catalyst-2960l-24tq-ll (environment) · cisco-catalyst-2960l-24ts-ll (environment) · cisco-catalyst-2960l-48pq-ll (environment) · cisco-catalyst-2960l-48ps-ll (environment) · cisco-catalyst-2960l-48tq-ll (environment) · cisco-catalyst-2960l-48ts-ll (environment) · cisco-catalyst-2960l-8ps-ll (environment) · cisco-catalyst-2960l-8ts-ll (environment)

Catalyst 1000-16Fp-2G-L · Ciscodevice

80%

All versions

Catalyst 1000-16P-2G-L · Ciscodevice

80%

All versions

Catalyst 1000-16T-2G-L · Ciscodevice

80%

All versions

Catalyst 1000-16T-E-2G-L · Ciscodevice

80%

All versions