What is CVE-2011-4875?

CVE-2011-4875 is a vulnerability in Siemens Simatic Hmi Panels, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2012-02-03.

Is CVE-2011-4875 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Buffer overflow in Siemens Simatic Hmi Panels

CVE-2011-4875

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.

Vulnerability class: Buffer Overflow

Published 2012-02-03 · last modified 2026-06-16.

CVSS v2 metric

CVSS v2 base score 9.3 (High). Vector: AV:N/AC:M/Au:N/C:C/I:C/A:C. This CVE predates CVSS v3 and has no v3 score from NVD.

EPSS exploit prediction

EPSS: 0.138 (96.4th percentile), scored 2026-10-02.

Moderate probability of exploitation in the next 30 days — watch for active exploitation reports. 96th percentile — 96.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.140 · newest: 0.138 · change: -0.002

Affected products

Siemens Simatic Hmi Panels — versions comfort_panels, mobile_panels, mp
Siemens Wincc — versions v11
Siemens Wincc Flexible — versions 2004, 2005, 2007
Siemens Wincc Flexible Runtime
Siemens Wincc Runtime Advanced — versions v11

Weakness classification (CWE)

CWE-119 — Improper Restriction of Operations within the Bounds of a Memory Buffer

Public proof-of-concept exploits

ARPSyndicate/cve-scores

References

www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-02.pdf
www.osvdb.org/77380 (vdb-entry)
www.us-cert.gov/control_systems/pdf/ICS-ALERT-11-332-02A.pdf
www.siemens.com/corporate-technology/pool/de/forschungsfelder/siemens_security_… (Vendor Advisory)
www.exploit-db.com/exploits/18166 (exploit)
aluigi.org/adv/winccflex_1-adv.txt
exchange.xforce.ibmcloud.com/vulnerabilities/71449 (vdb-entry)
www.us-cert.gov/control_systems/pdf/ICSA-12-030-01.pdf (US Government Resource)

Frequently asked questions

What is CVE-2011-4875?: CVE-2011-4875 is a vulnerability in Siemens Simatic Hmi Panels, classified under Improper Restriction of Operations within the Bounds of a Memory Buffer. Published 2012-02-03.
Is CVE-2011-4875 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.