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CVE-2011-4508

HIGH · CVSS 9.3EPSS 3.0%EU EUVD

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.

Key facts

CVSS score
9.3 (v2.0)
Severity
HIGH
CVSS vector
AV:N/AC:M/Au:N/C:C/I:C/A:C
Weakness (CWE)
CWE-287
EPSS score
3.0% (87th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2011-4434)
Published
February 3, 2012
NVD last modified
June 16, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2011-4434 in the EU Vulnerability Database. Last updated in EUVD on September 16, 2024.

View on the EU Vulnerability Database

Affected products

  • siemens / simatic hmi panels
  • siemens / simatic hmi panels
  • siemens / simatic hmi panels
  • siemens / simatic hmi panels
  • siemens / simatic hmi panels
  • siemens / wincc
  • siemens / wincc
  • siemens / wincc
  • siemens / wincc flexible
  • siemens / wincc flexible
  • siemens / wincc flexible
  • siemens / wincc flexible
  • siemens / wincc flexible
  • siemens / wincc flexible
  • siemens / wincc flexible runtime
  • siemens / wincc runtime advanced

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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