What’s Vulnerable › Vulnerabilities

CVE-2011-4509

• Severity: critical (CVSS 10.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 2.0% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2012-02-03 · updated 2026-06-16
• Weakness: CWE-264

Description

The HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; WinCC V11 Runtime Advanced; and WinCC flexible Runtime has an improperly selected default password for the administrator account, which makes it easier for remote attackers to obtain access via a brute-force approach involving many HTTP requests.

Affected products

• Siemens Simatic Hmi Panels: comfort_panels, mobile_panels, mp, op, tp
• Siemens SIMATIC WinCC: v11
• Siemens Wincc Flexible: 2004, 2005, 2007, 2008
• Siemens Wincc Flexible Runtime: all versions
• Siemens Wincc Runtime Advanced: v11

References

• http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf
• http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf
• http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf
• http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf

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