CVE-2016-8562 — Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability

A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TI

01What is this vulnerability?

A vulnerability has been identified in SIMATIC CP 1543-1 (All versions < V2.0.28), SIPLUS NET CP 1543-1 (All versions < V2.0.28). Under special conditions it was possible to write SNMP variables on port 161/udp which should be read-only and should only be configured with TIA-Portal. A write to these variables could reduce the availability or cause a denial-of-service.

02Affected products

Vendor	Product	Versions
n	a / n/a	n/a

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2022-03-03. Ransomware use: Unknown.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2016-11-18T21:00:00.000Z
• Last modified: 2025-10-21T23:55:48.030Z
• Added to CISA KEV: 2022-03-03
• BOD 22-01 due: 2022-03-24

09References

• www.securityfocus.com — http://www.securityfocus.com/bid/94436
• ics-cert.us-cert.gov — https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01
• www.siemens.com — http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdf
• cert-portal.siemens.com — https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdf