HmiLoad in the runtime loader in Siemens WinCC flexible 2004, 2005, 2007, and 2008; WinCC V11 (aka TIA portal); the TP, OP, MP, Comfort Pan…

published 2012-02-03 14 y ago modified 2026-06-16 4 mo ago also EUVD-2011-4794

cvss: 7.1; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 7.3%; EPSS 7.3% chance of exploitation in 30 days, percentile 94%
public exploits: 1; Exploit-DB

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 cause a denial of service (application crash) by sending crafted data over TCP.

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-12-030-01A updated 2025-06-09 cvss 7.1

Siemens SIMATIC WinCC Vulnerabilities

Siemens Multiple SIMATIC HMI panels (TP, OP, MP, Comfort Panels, Mobile Panels) Siemens WinCC flexible 2004, 2005, 2007, 2008 Siemens WinCC flexible Runtime Siemens WinCC V11 (TIA portal) Siemens WinCC V11 Runtime Advanced
affected: mitigation “WinCC V11 (TIA Portal) SP2 Update 1, (http://support.automation.siemens.com/WW/view/en/58112587)”

From CISA ICS and IT advisories (CSAF, https://github.com/cisagov/CSAF), a U.S. Government work; changed: reduced to products, statuses and remediations. CISA notification · csaf

Timeline

2011-11-28 First public exploit (EDB-18166)
2012-02-03 Published

Exploit prediction

7.26% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

EDB-18166 Siemens SIMATIC WinCC Flexible (Runtime) - Multiple Vulnerabilities dos, 2011-11-28

CVSS scores

assigned by	version	score	vector
NVD	2.0	7.1	AV:N/AC:M/Au:N/C:N/I:N/A:C

Classification

Weakness

CWE-20 Improper Input Validation

References

exploit-db.com /exploits/18166
exploit
siemens.com /corporate-technology/pool/de/forschungsfelder/siemens_security_advisory_ssa-345442.pdf
vendor-advisory
us-cert.gov /control_systems/pdf/ICS-ALERT-11-332-02.pdf
us-cert.gov /control_systems/pdf/ICS-ALERT-11-332-02A.pdf
aluigi.org /adv/winccflex_1-adv.txt
exchange.xforce.ibmcloud.com /vulnerabilities/71451
vdb-entry
osvdb.org /77382
vdb-entry
us-cert.gov /control_systems/pdf/ICSA-12-030-01.pdf
us-government-resource

Sources

CVE List CVE-2011-4877
NVD CVE-2011-4877

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary