{"id":"CVE-2011-4508","aliases":["EUVD-2011-4434","GHSA-fmw2-jxvh-9jcr"],"status":"published","title":"The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 ...","description":"The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime generates predictable authentication tokens for cookies, which makes it easier for remote attackers to bypass authentication via a crafted cookie.","severity":{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.02979,"percentile":0.87367,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-287"],"published":"2012-02-03T20:00:00Z","modified":"2026-06-16T23:34:57Z","products":[{"vendor":"siemens","product":"simatic_hmi_panels"},{"vendor":"siemens","product":"wincc"},{"vendor":"siemens","product":"wincc_flexible"},{"vendor":"siemens","product":"wincc_flexible_runtime"},{"vendor":"siemens","product":"wincc_runtime_advanced"}],"references":[{"url":"http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf","tags":["x_refsource_MISC","x_transferred","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2011-4508"},{"url":"https://github.com/advisories/GHSA-fmw2-jxvh-9jcr"}],"sources":{"cve":[{"id":"CVE-2011-4508","description":"The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime generates predictable authentication tokens for cookies, which makes it easier for remote attackers to bypass authentication via a crafted cookie.","status":"published","published":"2012-02-03T20:00:00Z","modified":"2024-09-16T20:47:55.183Z","updated_at":"2026-11-02T14:35:37.989579Z"}],"euvd":[{"id":"EUVD-2011-4434","description":"The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime generates predictable authentication tokens for cookies, which makes it easier for remote attackers to bypass authentication via a crafted cookie.","status":"published","published":"2012-02-03T20:00:00Z","modified":"2024-09-16T20:47:55Z","updated_at":"2026-11-03T00:55:10.854479Z"}],"ghsa":[{"id":"GHSA-fmw2-jxvh-9jcr","title":"The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 ...","description":"The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime generates predictable authentication tokens for cookies, which makes it easier for remote attackers to bypass authentication via a crafted cookie.","status":"published","published":"2022-05-17T05:34:22Z","modified":"2023-01-28T05:04:03Z","cwes":["CWE-287"],"updated_at":"2026-11-02T14:44:05.920704Z"}],"nvd":[{"id":"CVE-2011-4508","description":"The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime generates predictable authentication tokens for cookies, which makes it easier for remote attackers to bypass authentication via a crafted cookie.","status":"published","published":"2012-02-03T20:55:01.25Z","modified":"2026-06-16T23:34:57.603Z","cvss":[{"version":"2.0","score":9.3,"vector":"AV:N/AC:M/Au:N/C:C/I:C/A:C","level":"high","assessor":"primary"}],"cwes":["CWE-287"],"updated_at":"2026-11-02T14:02:12.272092Z"}]}}