CVE-2011-4667
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.
Key facts
- CVSS score
- 5.9 (v3.0)
- Severity
- MEDIUM
- CVSS vector
CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N- Weakness (CWE)
- CWE-310
- EPSS score
- 0.7% (52th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2011-4585)
- Published
- September 25, 2017
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2011-4585 in the EU Vulnerability Database. Last updated in EUVD on August 7, 2024.
View on the EU Vulnerability DatabaseAffected products
- cisco / ios
- cisco / ios
- cisco / ios
- cisco / ios
- cisco / ios
- cisco / nx-os
Certified products that may be affected
1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.
- Cisco Nexus 5000 Series Switch w/2000 Series Fabric Extenders running s/w NX-OS v5.0(3)N1(1c), and Cisco Secure Access Control Server (ACS) running s/w v5.2 patch 3 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-10384-2011 - archived
References
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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