What is CVE-2016-8562?

CVE-2016-8562 is a high-severity vulnerability in Siemens Simatic Cp 1543-1. CVSS score: 7.5/10. Published 2016-11-18.

How severe is CVE-2016-8562?

High severity. CVSS v3 base score is 7.5 out of 10.

Is CVE-2016-8562 known to be exploited?

Yes. CVE-2016-8562 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.

Vulnerability in Siemens Simatic Cp 1543-1

CVE-2016-8562

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.

Published 2016-11-18 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.036 (89.3th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 89th percentile — 89.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.036 · newest: 0.036 · change: 0.000

Affected products

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2022-03-03. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2022-03-24.

Required action: Apply updates per vendor instructions.

Public proof-of-concept exploits

References

www.securityfocus.com/bid/94436 (VDB Entry, Third Party Advisory, vdb-entry, Broken Link)
ics-cert.us-cert.gov/advisories/ICSA-16-327-01 (US Government Resource, Third Party Advisory)
www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdf (Patch, Broken Link, Vendor Advisory)
cert-portal.siemens.com/productcert/pdf/ssa-672373.pdf (Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (US Government Resource)

Frequently asked questions

What is CVE-2016-8562?: CVE-2016-8562 is a high-severity vulnerability in Siemens Simatic Cp 1543-1. CVSS score: 7.5/10. Published 2016-11-18.
How severe is CVE-2016-8562?: High severity. CVSS v3 base score is 7.5 out of 10.
Is CVE-2016-8562 known to be exploited?: Yes. CVE-2016-8562 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-03-03), indicating it is being actively exploited. 2 public proof-of-concept repositories are indexed.