{"cve":"CVE-2011-4667","nvd":{"published":"2017-09-25T21:29:00.180","modified":"2026-06-16T23:35:12.320","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.0","vector":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","score":5.9},"cwes":["CWE-310"],"references":["https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/Cisco-SA-20120913-CVE-2011-4667","https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/release/notes/ol_14271/caveats_SXI_rebuilds.html","https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/Cisco-SA-20120913-CVE-2011-4667","https://www.cisco.com/c/en/us/td/docs/switches/lan/catalyst6500/ios/12-2SX/release/notes/ol_14271/caveats_SXI_rebuilds.html"],"products":["cisco:ios","cisco:nx-os"],"source":"nvd","synced_at":"2026-10-19T20:46:01.145313090+00:00"},"epss":{"cve":"CVE-2011-4667","score":0.00688,"percentile":0.5274,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}