CVE-2011-4508

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.

Published: 2012-02-03 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2011-4508 is rated Moderate Risk (58.2/100): CVSS Critical severity, with medium exploitation likelihood (EPSS 0.41%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2011-4508

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-10-13 0.55% 0.41% -0.14%
2 2025-10-10 0.19% 0.55% +0.36%
3 2025-03-17 — 0.19% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2011-4508

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
9.3 2.0 HIGH
AV:N/AC:M/Au:N/C:C/I:C/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:M)
Exploitation needs some favorable conditions, but not exceptional ones.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:C)
Complete confidentiality impact.
Integrity impact (I:C)
Complete integrity impact.
Availability impact (A:C)
Complete availability impact.
 8.6 10.0 [email protected]

Weakness enumeration for CVE-2011-4508

Affected software / configurations for CVE-2011-4508

Vendor Product Version Raw CPE
siemens wincc_flexible 2004 cpe:2.3:a:siemens:wincc_flexible:2004:*:*:*:*:*:*:*
siemens wincc_flexible 2005 cpe:2.3:a:siemens:wincc_flexible:2005:*:*:*:*:*:*:*
siemens wincc_flexible 2007 cpe:2.3:a:siemens:wincc_flexible:2007:*:*:*:*:*:*:*
siemens wincc_flexible 2008 cpe:2.3:a:siemens:wincc_flexible:2008:*:*:*:*:*:*:*
siemens wincc_flexible 2008 cpe:2.3:a:siemens:wincc_flexible:2008:sp1:*:*:*:*:*:*
siemens wincc_flexible 2008 cpe:2.3:a:siemens:wincc_flexible:2008:sp2:*:*:*:*:*:*
siemens wincc <= v11 cpe:2.3:a:siemens:wincc:*:sp2:*:*:*:*:*:*
siemens wincc v11 cpe:2.3:a:siemens:wincc:v11:*:*:*:*:*:*:*
siemens wincc v11 cpe:2.3:a:siemens:wincc:v11:sp1:*:*:*:*:*:*
siemens simatic_hmi_panels comfort_panels cpe:2.3:a:siemens:simatic_hmi_panels:comfort_panels:*:*:*:*:*:*:*
siemens simatic_hmi_panels mobile_panels cpe:2.3:a:siemens:simatic_hmi_panels:mobile_panels:*:*:*:*:*:*:*
siemens simatic_hmi_panels mp cpe:2.3:a:siemens:simatic_hmi_panels:mp:*:*:*:*:*:*:*
siemens simatic_hmi_panels op cpe:2.3:a:siemens:simatic_hmi_panels:op:*:*:*:*:*:*:*
siemens simatic_hmi_panels tp cpe:2.3:a:siemens:simatic_hmi_panels:tp:*:*:*:*:*:*:*
siemens wincc_runtime_advanced v11 cpe:2.3:a:siemens:wincc_runtime_advanced:v11:*:*:*:*:*:*:*
siemens wincc_flexible_runtime — cpe:2.3:a:siemens:wincc_flexible_runtime:*:*:*:*:*:*:*:*

References for CVE-2011-4508

cvelogic Threat Intelligence