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.
Metrics
Affected Vendors & Products
References
History
Tue, 05 Aug 2025 14:15:00 +0000
Type | Values Removed | Values Added |
---|---|---|
First Time appeared |
Cisco
Cisco catalyst 1000-16fp-2g-l Cisco catalyst 1000-16p-2g-l Cisco catalyst 1000-16t-2g-l Cisco catalyst 1000-16t-e-2g-l Cisco catalyst 1000-24fp-4g-l Cisco catalyst 1000-24fp-4x-l Cisco catalyst 1000-24p-4g-l Cisco catalyst 1000-24p-4x-l Cisco catalyst 1000-24pp-4g-l Cisco catalyst 1000-24t-4g-l Cisco catalyst 1000-24t-4x-l Cisco catalyst 1000-48fp-4g-l Cisco catalyst 1000-48fp-4x-l Cisco catalyst 1000-48p-4g-l Cisco catalyst 1000-48p-4x-l Cisco catalyst 1000-48pp-4g-l Cisco catalyst 1000-48t-4g-l Cisco catalyst 1000-48t-4x-l Cisco catalyst 1000-8fp-2g-l Cisco catalyst 1000-8fp-e-2g-l Cisco catalyst 1000-8p-2g-l Cisco catalyst 1000-8p-e-2g-l Cisco catalyst 1000-8t-2g-l Cisco catalyst 1000-8t-e-2g-l Cisco catalyst 1000fe-24p-4g-l Cisco catalyst 1000fe-24t-4g-l Cisco catalyst 1000fe-48p-4g-l Cisco catalyst 1000fe-48t-4g-l Cisco catalyst 2960l-16ps-ll Cisco catalyst 2960l-16ts-ll Cisco catalyst 2960l-24pq-ll Cisco catalyst 2960l-24ps-ll Cisco catalyst 2960l-24tq-ll Cisco catalyst 2960l-24ts-ll Cisco catalyst 2960l-48pq-ll Cisco catalyst 2960l-48ps-ll Cisco catalyst 2960l-48tq-ll Cisco catalyst 2960l-48ts-ll Cisco catalyst 2960l-8ps-ll Cisco catalyst 2960l-8ts-ll Cisco ios |
|
CPEs | cpe:2.3:h:cisco:catalyst_1000-16fp-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-16p-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-16t-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-16t-e-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-24fp-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-24fp-4x-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-24p-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-24p-4x-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-24pp-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-24t-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-24t-4x-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-48fp-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-48fp-4x-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-48p-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-48p-4x-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-48pp-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-48t-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-48t-4x-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-8fp-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-8fp-e-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-8p-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-8p-e-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-8t-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000-8t-e-2g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000fe-24p-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000fe-24t-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000fe-48p-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_1000fe-48t-4g-l:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-16ps-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-16ts-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-24pq-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-24ps-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-24tq-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-24ts-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-48pq-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-48ps-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-48tq-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-48ts-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-8ps-ll:-:*:*:*:*:*:*:* cpe:2.3:h:cisco:catalyst_2960l-8ts-ll:-:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(5a\)e:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(5b\)e:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(5c\)e:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(6\)e0c:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(6\)e1:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(6\)e2:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(6\)e2b:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(6\)e3:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(6\)e:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e0a:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e0s:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e10:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e11:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e12:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e1:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e1a:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e2:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e3:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e3k:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e4:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e5:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e6:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e7:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e8:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e9:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7\)e:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7a\)e0b:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(7b\)e0b:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(8\)e1:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(8\)e2:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(8\)e3:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(8\)e4:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(8\)e5:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(8\)e6:*:*:*:*:*:*:* cpe:2.3:o:cisco:ios:15.2\(8\)e:*:*:*:*:*:*:* |
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Vendors & Products |
Cisco
Cisco catalyst 1000-16fp-2g-l Cisco catalyst 1000-16p-2g-l Cisco catalyst 1000-16t-2g-l Cisco catalyst 1000-16t-e-2g-l Cisco catalyst 1000-24fp-4g-l Cisco catalyst 1000-24fp-4x-l Cisco catalyst 1000-24p-4g-l Cisco catalyst 1000-24p-4x-l Cisco catalyst 1000-24pp-4g-l Cisco catalyst 1000-24t-4g-l Cisco catalyst 1000-24t-4x-l Cisco catalyst 1000-48fp-4g-l Cisco catalyst 1000-48fp-4x-l Cisco catalyst 1000-48p-4g-l Cisco catalyst 1000-48p-4x-l Cisco catalyst 1000-48pp-4g-l Cisco catalyst 1000-48t-4g-l Cisco catalyst 1000-48t-4x-l Cisco catalyst 1000-8fp-2g-l Cisco catalyst 1000-8fp-e-2g-l Cisco catalyst 1000-8p-2g-l Cisco catalyst 1000-8p-e-2g-l Cisco catalyst 1000-8t-2g-l Cisco catalyst 1000-8t-e-2g-l Cisco catalyst 1000fe-24p-4g-l Cisco catalyst 1000fe-24t-4g-l Cisco catalyst 1000fe-48p-4g-l Cisco catalyst 1000fe-48t-4g-l Cisco catalyst 2960l-16ps-ll Cisco catalyst 2960l-16ts-ll Cisco catalyst 2960l-24pq-ll Cisco catalyst 2960l-24ps-ll Cisco catalyst 2960l-24tq-ll Cisco catalyst 2960l-24ts-ll Cisco catalyst 2960l-48pq-ll Cisco catalyst 2960l-48ps-ll Cisco catalyst 2960l-48tq-ll Cisco catalyst 2960l-48ts-ll Cisco catalyst 2960l-8ps-ll Cisco catalyst 2960l-8ts-ll Cisco ios |
Mon, 14 Jul 2025 13:45:00 +0000
Type | Values Removed | Values Added |
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Metrics |
epss
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epss
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Wed, 07 May 2025 20:15:00 +0000
Type | Values Removed | Values Added |
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Metrics |
ssvc
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Wed, 07 May 2025 17:45:00 +0000
Type | Values Removed | Values Added |
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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. | |
Weaknesses | CWE-284 | |
References |
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Metrics |
cvssV3_1
|

Status: PUBLISHED
Assigner: cisco
Published: 2025-05-07T17:31:45.590Z
Updated: 2025-05-07T19:45:55.934Z
Reserved: 2024-10-10T19:15:13.213Z
Link: CVE-2025-20137

Updated: 2025-05-07T18:56:19.336Z

Status : Analyzed
Published: 2025-05-07T18:15:36.473
Modified: 2025-08-05T14:08:32.490
Link: CVE-2025-20137

No data.