CVE-2011-2581 - CVE House
Back to Database
Status published Medium CVE-2011-2581

The ACL implementation in Cisco NX-OS 5.0(2) and 5.0(3) before...

Vulnerability Description

The ACL implementation in Cisco NX-OS 5.0(2) and 5.0(3) before 5.0(3)N2(1) on Nexus 5000 series switches, and NX-OS before 5.0(3)U1(2a) on Nexus 3000 series switches, does not properly handle comments in conjunction with deny statements, which allows remote attackers to bypass intended access restrictions in opportunistic circumstances by sending packets, aka Bug IDs CSCto09813 and CSCtr61490.

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

THREAT MONITOR

Am I Vulnerable?

Launch our assessment wizard to check if your infrastructure is exposed to • CVE-2011-2581

Credits & Attribution

No credits recorded in the NVD database.

References

More from cisco

View All →
CVE-2025-27091
OpenH264 Decoding Functions Heap Overflow Vulnerability
High 8.6
CVE-2023-25653
Improper calculations in ECC implementation can trigger a Denial-of-Service (DoS)
High 7.5
CVE-2021-33478
The TrustZone implementation in certain Broadcom MediaxChange firmware could allow...
Medium 6.8
CVE-2020-16139
A denial-of-service in Cisco Unified IP Conference Station 7937G 1-4-4-0...
High 7.5
CVE-2020-16138
A denial-of-service issue in Cisco Unified IP Conference Station 7937G...
High 7.5

Affected Vendor

Affected Software

nx-os, nexus 5000, nexus 3000
Vulnerable Versions:
5.0\(2\), 5.0\(3\)n1\(1\), 5.0\(3\)n1\(1a\), 5.0\(3\)n1\(1b\), 5.0\(3\), 5.0\(3\)n1\(1c\), 0, 5.0\(3\)u1\(1a\), 5.0\(3\)u1\(1b\), 5.0\(3\)u1\(1d\)

Timeline

Official Publish: September 14th, 2011
Last Modified: August 6th, 2024
Added to House: July 19th, 2026

CVSS Vectors

Weaknesses (CWE)

No CWE data available

MITRE ATT&CK TTPs

No associated TTPs found for this vulnerability.