{"id":"CVE-2011-4661","aliases":["EUVD-2011-4579","GHSA-97hh-xg4h-8gvc"],"status":"published","title":"A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP...","description":"A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP PROXY Server process (aka CSCtu52820), when configured with Cisco ISR Web Security with Cisco ScanSafe and User Authenticaiton NTLM configured.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01014,"percentile":0.63674,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-772"],"published":"2020-02-12T16:43:39Z","modified":"2026-06-16T23:35:12Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"https://www.cisco.com/c/en/us/td/docs/ios/15_2m_and_t/release/notes/15_2m_and_t/152-1TCAVS.html","tags":["x_refsource_MISC","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-4661"},{"url":"https://github.com/advisories/GHSA-97hh-xg4h-8gvc"}],"sources":{"cve":[{"id":"CVE-2011-4661","description":"A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP PROXY Server process (aka CSCtu52820), when configured with Cisco ISR Web Security with Cisco ScanSafe and User Authenticaiton NTLM configured.","status":"published","published":"2020-02-12T16:43:39Z","modified":"2024-11-15T17:41:53.495Z","updated_at":"2026-11-02T14:35:37.671707Z"}],"euvd":[{"id":"EUVD-2011-4579","description":"A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP PROXY Server process (aka CSCtu52820), when configured with Cisco ISR Web Security with Cisco ScanSafe and User Authenticaiton NTLM configured.","status":"published","published":"2020-02-12T16:43:39Z","modified":"2024-11-15T17:41:53Z","updated_at":"2026-11-03T00:04:58.605338Z"}],"ghsa":[{"id":"GHSA-97hh-xg4h-8gvc","title":"A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP...","description":"A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP PROXY Server process (aka CSCtu52820), when configured with Cisco ISR Web Security with Cisco ScanSafe and User Authenticaiton NTLM configured.","status":"published","published":"2022-04-22T00:24:27Z","modified":"2023-01-27T05:02:10Z","updated_at":"2026-11-02T14:42:01.451226Z"}],"nvd":[{"id":"CVE-2011-4661","description":"A memory leak vulnerability exists in Cisco IOS before 15.2(1)T due to a memory leak in the HTTP PROXY Server process (aka CSCtu52820), when configured with Cisco ISR Web Security with Cisco ScanSafe and User Authenticaiton NTLM configured.","status":"published","published":"2020-02-12T17:15:11.593Z","modified":"2026-06-16T23:35:12.213Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-772"],"updated_at":"2026-11-02T14:02:12.945371Z"}]}}