Siemens SIMATIC WinCC OA before 3.12 P002 January allows remote attackers to cause a denial of service (monitoring-service outage) via malf…

published 2014-02-07 12 y ago modified 2026-06-17 4 mo ago also EUVD-2014-1773

cvss: 5.0; version 2.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 2.1%; EPSS 2.1% chance of exploitation in 30 days, percentile 82%
public exploits: 0; none known

Siemens SIMATIC WinCC OA before 3.12 P002 January allows remote attackers to cause a denial of service (monitoring-service outage) via malformed HTTP requests to port 4999.

Vendor advisories

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

cisa ICSA-14-035-01 updated 2025-06-09 cvss 5.0

Siemens SIMATIC WinCC OA Multiple Vulnerabilities

Siemens SIMATIC WinCC OA <3.12_P002
affected: mitigation “Siemens recommends updating to SIMATIC WinCC OA v3.12 and to install patch P002 January”

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

Exploit prediction

2.14% chance of exploitation in the next 30 days, higher than 82% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-399 Resource Management Errors

References

siemens.com /innovation/pool/de/forschungsfelder/siemens_security_advisory_ssa-342587.pdf
vendor-advisory
osvdb.org /102812
vdb-entry
exchange.xforce.ibmcloud.com /vulnerabilities/90936
vdb-entry
securityfocus.com /bid/65347
vdb-entry
secunia.com /advisories/56651
third-party-advisory
ics-cert.us-cert.gov /advisories/ICSA-14-035-01
us-government-resource

Sources

CVE List CVE-2014-1699
NVD CVE-2014-1699

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