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Vulnerability record · CVE-2011-4875 · published 3 February 2012

CVE-2011-4875: Siemens wincc flexible memory buffer overflow vulnerability

Siemens · Wincc Flexible

Stack-based buffer overflow in HmiLoad in the runtime loader 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, when Transfer Mode is enabled, allows remote attackers to execute arbitrary code via vectors related to Unicode strings.

9.3 CVSS 2.0 High EPSS 14% · top 3.6% CWE-119 · Memory buffer overflow
9.3CVSS 2.0 base score
14%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
16References
16 Jun 2026Last modified by NVD

Description

Stack-based buffer overflow in HmiLoad in the runtime loader 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, when Transfer Mode is enabled, allows remote attackers to execute arbitrary code via vectors related to Unicode strings.

AV:N/AC:M/Au:N/C:C/I:C/A:C

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://aluigi.org/adv/winccflex_1-adv.txt
http://www.exploit-db.com/exploits/18166
http://www.osvdb.org/77380
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf Vendor Advisory
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-02.pdf
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-02A.pdf
http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf US Government Resource
https://exchange.xforce.ibmcloud.com/vulnerabilities/71449
http://aluigi.org/adv/winccflex_1-adv.txt
http://www.exploit-db.com/exploits/18166
http://www.osvdb.org/77380
http://www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf Vendor Advisory
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-02.pdf
http://www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-02A.pdf
http://www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf US Government Resource
https://exchange.xforce.ibmcloud.com/vulnerabilities/71449

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2011-4509Siemens wincc flexible permissions and access controls vulnerabilityThe 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 Panel…EPSS 2.0%10.0CVE-2011-4513Siemens wincc flexible vulnerabilitySiemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); the TP, OP, MP, Comfort Panels, and Mobile Panels SIMATIC HMI panels; …EPSS 4.8%10.0CVE-2011-4514Siemens wincc flexible improper authentication vulnerabilityThe TELNET daemon in Siemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); the TP, OP, MP, Comfort Panels, and Mobile Panels…EPSS 3.4%9.3CVE-2011-4508Siemens wincc flexible improper authentication vulnerabilityThe 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, C…EPSS 3.0%9.3CVE-2011-4876Siemens wincc flexible path traversal vulnerabilityDirectory traversal vulnerability in HmiLoad in the runtime loader in Siemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); …EPSS 9.0%8.5CVE-2011-4879Siemens wincc flexible improper input validation vulnerabilityminiweb.exe in the HMI web server in Siemens WinCC flexible 2004, 2005, 2007, and 2008 before SP3; WinCC V11 (aka TIA portal) before SP2 Update 1; th…EPSS 12%8.2CVE-2017-12069Siemens simatic pcs7 xml external entity (xxe) vulnerabilityAn XXE vulnerability has been identified in OPC Foundation UA .NET Sample Code before 2017-03-21 and Local Discovery Server (LDS) before 1.03.367. Am…EPSS 2.9%7.8CVE-2023-30897Siemens wincc incorrect permission assignment vulnerabilityA vulnerability has been identified in SIMATIC WinCC (All versions < V7.5.2.13). Affected applications fail to set proper access rights for their ins…EPSS 0.21%

Source: NIST National Vulnerability Database (record CVE-2011-4875), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.