Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability

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• cpe siemens/simatic cp 1543-1 firmwareversion unspecified
• cpe siemens/siplus net cp 1543-1 firmwareversion unspecified
• vendor Siemens SIMATIC CPversion unspecified

How to fix CVE-2016-8562

• Recommended remediation

  Apply updates per vendor instructions. CISA due date Mar 24, 2022.

• Official advisories

  • CISA KEV · cisa.gov
  • CVE.org · cve.org
  • FIRST EPSS · first.org
  • NIST NVD · nvd.nist.gov
  • VulnCheck KEV · vulncheck.com

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

1. Nov 18, 2016 · Catalog

   Detected

   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.

2. Mar 3, 2022 · CISA KEV

   Known exploited

   Apply updates per vendor instructions.

3. Mar 24, 2022 · CISA KEV

   Remediation due

   Apply updates per vendor instructions.

4. Jun 16, 2026 · Catalog

   Updated

   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.

Sources

• CISA KEVConfirmed exploitationCVE-2016-8562

  An improper privilege management vulnerability exists within the Siemens SIMATIC Communication Processor (CP) that allows a privileged attacker to remotely cause a denial of service.

  cisa.gov
• CVE.orgVulnerability recordCVE-2016-8562

  Official CVE identifier

  cve.org
• FIRST EPSSExploitation probabilityCVE-2016-8562

  30-day exploitation probability 3.6%

  first.org
• NIST NVDVulnerability recordCVE-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-Port

  nvd.nist.gov
• VulnCheck KEVConfirmed exploitationCVE-2016-8562

  An improper privilege management vulnerability exists within the Siemens SIMATIC Communication Processor (CP) that allows a privileged attacker to remotely cause a denial of service.

  vulncheck.com

References

• Broken Link · securityfocus.com
• Broken Link · siemens.com
• Vendor Advisory · cert-portal.siemens.com
• Third Party Advisory · ics-cert.us-cert.gov
• CISA note · nvd.nist.gov
• VulnCheck exploitation evidence · cisa.gov

Freshness

Last verified in this catalog Oct 17, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.