Medium severity5.9NVD Advisory· Published Sep 25, 2017· Updated Jun 16, 2026

CVE-2011-4667

Description

The encryption library in Cisco IOS Software 15.2(1)T, 15.2(1)T1, and 15.2(2)T, Cisco NX-OS in Cisco MDS 9222i Multiservice Modular Switch, Cisco MDS 9000 18/4-Port Multiservice Module, and Cisco MDS 9000 Storage Services Node module before 5.2(6), and Cisco IOS in Cisco VPN Services Port Adaptor for Catalyst 6500 12.2(33)SXI, and 12.2(33)SXJ when IP Security (aka IPSec) is used, allows remote attackers to obtain unencrypted packets from encrypted sessions.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./Cisco iOS5 versions
cpe:2.3:o:cisco:ios:12.2\(33\)sxi:*:*:*:*:*:*:*+ 4 more
- cpe:2.3:o:cisco:ios:12.2\(33\)sxi:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:12.2\(33\)sxj:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:15.2\(1\)t:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:15.2\(1\)t1:*:*:*:*:*:*:*
- cpe:2.3:o:cisco:ios:15.2\(2\)t:*:*:*:*:*:*:*
Cisco Systems, Inc./Nx OS2 versions
cpe:2.3:o:cisco:nx-os:5.0\(5\):*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:nx-os:5.0\(5\):*:*:*:*:*:*:*
- (no CPE)range: <5.2(6)
Cisco Systems, Inc./VPN Services Port Adaptor for Catalyst 6500llm-create
Range: 12.2(33)SXI, and 12.2(33)SXJ
Cisco Systems, Inc./iOS Xr Softwarellm-fuzzy
Range: 15.2(1)T, 15.2(1)T1, and 15.2(2)T

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/Cisco-SA-20120913-CVE-2011-4667nvdVendor Advisory
www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/release/notes/ol_14271/caveats_SXI_rebuilds.htmlnvdVendor Advisory

News mentions

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cvss	0.384
epss	0.001
exploit	0.000
kev	0.000
patch	0.000
ransomware	0.000