Siemens SIMATIC NET PC-Software before 13 SP2 allows remote attackers to cause a denial of service (OPC UA service outage) via crafted TCP…

published 2016-07-22 10 y ago modified 2026-06-17 4 mo ago also EUVD-2016-6808

cvss: 7.5; version 3.0, NVD
cisa kev: Not listed; not in CISA's catalog
epss: 3.5%; EPSS 3.5% chance of exploitation in 30 days, percentile 89%
public exploits: 0; none known

Siemens SIMATIC NET PC-Software before 13 SP2 allows remote attackers to cause a denial of service (OPC UA service outage) via crafted TCP packets.

Vendor advisories

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

cisa ICSA-16-208-02 updated 2025-06-09 cvss 5.3

Siemens SIMATIC NET PC-Software Denial-of-Service Vulnerability

Siemens SIMATIC NET PC-Software <V13_SP2
affected: mitigation “If OPC-UA is not required, Siemens recommends deactivating these in the communication settings according to the information in the respective product manual.” siemens.com

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

3.53% chance of exploitation in the next 30 days, higher than 89% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by	version	score	vector
NVD	3.0	7.5	CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD	2.0	5.0	AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness

CWE-20 Improper Input Validation

References

siemens.com /cert/pool/cert/siemens_security_advisory_ssa-453276.pdf
mitigation, vendor-advisory
securityfocus.com /bid/92110
vdb-entry, third-party-advisory
ics-cert.us-cert.gov /advisories/ICSA-16-208-02

Sources

CVE List CVE-2016-5874
NVD CVE-2016-5874

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