CVE-2016-8562

Name: CVE-2016-8562
Creator: NVD / NIST
Published: 2016-11-18T21:59:02.033+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 7.5/10Actively ExploitedEPSS 3.62%

Last modified Jun 17, 2026

CVE-2016-8562 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. 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. CISA has confirmed active exploitation in the wild. EPSS estimates a 3.62% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

7.5/10

CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

3.62%

88.0th percentile

Probability of exploitation in the next 30 days. Learn more

Exploitation Status

This vulnerability is listed in CISA’s Known Exploited Vulnerabilities catalog, confirming active exploitation in the wild. Federal agencies must remediate by Mar 24, 2022.

Affected Software

Vendor	Product	Versions
Siemens	Simatic Cp 1543-1 Firmware	< 2.0.28
Siemens	Siplus Net Cp 1543-1 Firmware	< 2.0.28

References

http://www.securityfocus.com/bid/94436Broken Link, Third Party Advisory, VDB Entry
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdfBroken Link, Patch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdfVendor Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/94436Broken Link, Third Party Advisory, VDB Entry
http://www.siemens.com/cert/pool/cert/siemens_security_advisory_ssa-672373.pdfBroken Link, Patch, Vendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-672373.pdfVendor Advisory
https://ics-cert.us-cert.gov/advisories/ICSA-16-327-01Third Party Advisory, US Government Resource
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2016-8562US Government Resource

Timeline

Published: Nov 18, 2016
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2016-8562?

How severe is CVE-2016-8562?

CVE-2016-8562 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 3.62% probability of exploitation in the next 30 days. This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog.

How do I fix CVE-2016-8562?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST