{"id":"CVE-2015-0607","aliases":["EUVD-2015-0620","GHSA-hmcj-2mfv-vx8m"],"status":"published","title":"The Authentication Proxy feature in Cisco IOS does not properly handle invalid AAA return codes...","description":"The Authentication Proxy feature in Cisco IOS does not properly handle invalid AAA return codes from RADIUS and TACACS+ servers, which allows remote attackers to bypass authentication in opportunistic circumstances via a connection attempt that triggers an invalid code, as demonstrated by a connection attempt with a blank password, aka Bug IDs CSCuo09400 and CSCun16016.","severity":{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-07","score":0.01969,"percentile":0.80513,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2015-03-06T02:00:00Z","modified":"2026-06-17T00:20:36Z","products":[{"vendor":"cisco","product":"ios"}],"references":[{"url":"http://www.securityfocus.com/bid/72794","tags":["vdb-entry","x_refsource_BID","x_transferred"]},{"url":"http://www.securitytracker.com/id/1031817","tags":["vdb-entry","x_refsource_SECTRACK","x_transferred"]},{"url":"http://tools.cisco.com/security/center/viewAlert.x?alertId=37711","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://tools.cisco.com/security/center/content/CiscoSecurityNotice/CVE-2015-0607","tags":["vendor-advisory","x_refsource_CISCO","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2015-0607"},{"url":"https://github.com/advisories/GHSA-hmcj-2mfv-vx8m"}],"sources":{"cve":[{"id":"CVE-2015-0607","description":"The Authentication Proxy feature in Cisco IOS does not properly handle invalid AAA return codes from RADIUS and TACACS+ servers, which allows remote attackers to bypass authentication in opportunistic circumstances via a connection attempt that triggers an invalid code, as demonstrated by a connection attempt with a blank password, aka Bug IDs CSCuo09400 and CSCun16016.","status":"published","published":"2015-03-06T02:00:00Z","modified":"2024-08-06T04:17:32.833Z","updated_at":"2026-11-02T14:35:45.428221Z"}],"euvd":[{"id":"EUVD-2015-0620","description":"The Authentication Proxy feature in Cisco IOS does not properly handle invalid AAA return codes from RADIUS and TACACS+ servers, which allows remote attackers to bypass authentication in opportunistic circumstances via a connection attempt that triggers an invalid code, as demonstrated by a connection attempt with a blank password, aka Bug IDs CSCuo09400 and CSCun16016.","status":"published","published":"2015-03-06T02:00:00Z","modified":"2024-08-06T04:17:32Z","updated_at":"2026-11-03T02:22:18.860994Z"}],"ghsa":[{"id":"GHSA-hmcj-2mfv-vx8m","title":"The Authentication Proxy feature in Cisco IOS does not properly handle invalid AAA return codes...","description":"The Authentication Proxy feature in Cisco IOS does not properly handle invalid AAA return codes from RADIUS and TACACS+ servers, which allows remote attackers to bypass authentication in opportunistic circumstances via a connection attempt that triggers an invalid code, as demonstrated by a connection attempt with a blank password, aka Bug IDs CSCuo09400 and CSCun16016.","status":"published","published":"2022-05-17T04:15:12Z","modified":"2023-01-28T05:01:26Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:43:33.736756Z"}],"nvd":[{"id":"CVE-2015-0607","description":"The Authentication Proxy feature in Cisco IOS does not properly handle invalid AAA return codes from RADIUS and TACACS+ servers, which allows remote attackers to bypass authentication in opportunistic circumstances via a connection attempt that triggers an invalid code, as demonstrated by a connection attempt with a blank password, aka Bug IDs CSCuo09400 and CSCun16016.","status":"published","published":"2015-03-06T03:00:13.47Z","modified":"2026-06-17T00:20:36.387Z","cvss":[{"version":"2.0","score":4.3,"vector":"AV:N/AC:M/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:03:03.313464Z"}]}}