The encryption library in Cisco IOS Software 15.2(1)T, 15.2(1)T1, and 15.2(2)T, Cisco…
Priority LOW 28CWE-310Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- High
- Impact type
- —
- Confidentiality · integrity · availability
- High · None · None
- Fix status
- No fix listed
Attack profile from CVSS 3.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.00688 52nd percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 6
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:cisco:ios:12.2\(33\)sxi:*:*:*:*:*:*:* | 12.2(33)sxi | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:12.2\(33\)sxj:*:*:*:*:*:*:* | 12.2(33)sxj | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.2\(1\)t:*:*:*:*:*:*:* | 15.2(1)t | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.2\(1\)t1:*:*:*:*:*:*:* | 15.2(1)t1 | Vulnerable | Cisco |
| cpe:2.3:o:cisco:ios:15.2\(2\)t:*:*:*:*:*:*:* | 15.2(2)t | Vulnerable | Cisco |
| cpe:2.3:o:cisco:nx-os:5.0\(5\):*:*:*:*:*:*:* | 5.0(5) | Vulnerable | Cisco |
- cpe:2.3:o:cisco:ios:12.2\(33\)sxi:*:*:*:*:*:*:* Versions 12.2(33)sxi Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:12.2\(33\)sxj:*:*:*:*:*:*:* Versions 12.2(33)sxj Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.2\(1\)t:*:*:*:*:*:*:* Versions 15.2(1)t Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.2\(1\)t1:*:*:*:*:*:*:* Versions 15.2(1)t1 Vulnerable ·Cisco
- cpe:2.3:o:cisco:ios:15.2\(2\)t:*:*:*:*:*:*:* Versions 15.2(2)t Vulnerable ·Cisco
- cpe:2.3:o:cisco:nx-os:5.0\(5\):*:*:*:*:*:*:* Versions 5.0(5) Vulnerable ·Cisco
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2011-4667
- 2026-10-03 Alias added: GHSA-x2c2-mmqp-2682
References
More Cisco Ios vulnerabilities
- TI-2018-00138 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-09019 Improper input validation in Cisco IOS and IOS XE KEVCVSS 3.1CRITICAL 9.8
- TI-2017-02977 Improper input validation in Cisco IOS and IOS XE Software KEVCVSS 3.1CRITICAL 9.8
- TI-2018-00135 Memory corruption in Cisco IOS, IOS XE, and IOS XR KEVCVSS 3.1HIGH 8.8
- TI-2017-04499 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
- TI-2017-04498 Memory corruption in Cisco IOS KEVCVSS 3.1HIGH 8.8
Sources
- CVE-2011-4667 · CVE Program
- CVE-2011-4667 · NVD
- FIRST EPSS
- GHSA-x2c2-mmqp-2682 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences