Detections
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Cisco Nexus 3550-F Switches ACL Programming Bypass (cisco-sa-3550-acl-bypass-mhskZc2q)
medium Nessus Plugin ID 299956
Synopsis
The remote device is missing a security patch.Description
According to its self-reported version, Cisco Nexus 3550-F is affected by a vulnerability.- A vulnerability in the access control list (ACL) programming of Cisco Nexus 3550-F Switches could allow an unauthenticated, remote attacker to send traffic that should be blocked to the management interface of an affected device. This vulnerability is due to ACL deny rules not being properly enforced at the time of device reboot. An attacker could exploit this vulnerability by attempting to send traffic to the management interface of an affected device. A successful exploit could allow the attacker to send traffic to the management interface that should have been blocked by configured ACL deny rules. (CVE-2024-20371)
Please see the included Cisco BIDs and Cisco Security Advisory for more information.
Solution
Upgrade to the relevant fixed version referenced in Cisco bug ID CSCwi98129.See Also
Plugin Details
Severity: Medium
ID: 299956
File Name: cisco-sa-3550-acl-bypass-mhskZc2q.nasl
Version: 1.1
Type: local
Family: CISCO
Published: 2/25/2026
Updated: 2/25/2026
Supported Sensors: Nessus
Risk Information
VPR
Risk Factor: Low
Score: 1.4
CVSS v2
Risk Factor: Medium
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
CVSS Score Source: CVE-2024-20371
CVSS v3
Risk Factor: Medium
Base Score: 5.3
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
Vulnerability Information
CPE: cpe:/a:cisco:nexus-3550-f
Required KB Items: installed_sw/Cisco Nexus 3550-F
Exploit Ease: No known exploits are available
Patch Publication Date: 11/6/2024
Vulnerability Publication Date: 11/6/2024
Reference Information
CVE: CVE-2024-20371