CVE-2011-2581

mediumpriority · track · 21EPSS 0.020 · 81 %ileEUUS

grimoire priorityP3 · Track

Exploitable?

—

no known exploitation

Likely / severe?

1.99% (81st) EPSS

CVSS 5 · medium

Is it mine?

13 products

Check your exposure

Who says so?

2 sources

enisa_euvd · nvd

EPSS · scored 2026-10-28

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.

cvss

Technical severity, 0–10. One row per scoring source.

5.0

010

base score 0–10 · higher = more severe · hover a vector to decode

v2.05mediumAV:N/AC:L/Au:N/C:P/I:N/A:Nprimary · NVD / NIST USexploitability 10 · impact 2.9

v2.04.3mediumAV:N/AC:L/Au:N/C:P/I:N/A:N/E:Usecondary · CVSS-BT (t0sche)

weaknesses

The CWE weakness classes this flaw belongs to.

CWE-264USprimary

affected products (13)

Products and version ranges known to be affected.

n/a n/a≤ n/aenisa_euvdEU
cisco nexus 3000all versionsnvdUScpe:2.3:h:cisco:nexus_3000:*:*:*:*:*:*:*:*
cisco nexus 5000all versionsnvdUScpe:2.3:h:cisco:nexus_5000:*:*:*:*:*:*:*:*
cisco nx-os≤ 5.0\(3\)u1\(2\)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(2)nvdUScpe:2.3:a:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(3)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(3)n1(1)nvdUScpe:2.3:a:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(3)n1(1a)nvdUScpe:2.3:a:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(3)n1(1b)nvdUScpe:2.3:a:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(3)n1(1c)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(3)u1(1a)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(3)u1(1b)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*
cisco nx-os= 5.0(3)u1(1d)nvdUScpe:2.3:o:cisco:nx-os:*:*:*:*:*:*:*:*

also known as (2)

Other names and identifiers for this entity.

sources

Which sources assert this record, and when.

enisa_euvd nvd NVD CVE.org MITRE

published 2011-09-14modified 2026-06-16

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+8950 more

references (6)

External citations — patches, advisories, analysis.

scry

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