How severe is CVE-2016-8562?

CVE-2016-8562 has a CVSS score of 7.5/10, rated HIGH. Immediate patching is strongly recommended.

Which packages are affected by CVE-2016-8562?

Affected package information for CVE-2016-8562 is not yet fully mapped. Check the official advisory links for details.

How do I fix CVE-2016-8562?

No fixed version has been published for CVE-2016-8562 yet. Monitor the advisory for updates, apply mitigations recommended by the vendor, and use O3 Security to track when a fix becomes available in your stack.

Is CVE-2016-8562 actively exploited in the wild?

Yes. There are 1 known exploit references for CVE-2016-8562, including 1 in-the-wild exploitation observed on GitHub and other sources. Treat this as actively exploitable and prioritize patching immediately. All exploit code should only be run in an isolated sandbox environment for research or authorized testing — never against production systems without explicit written authorization.

What is the EPSS score for CVE-2016-8562?

CVE-2016-8562 has an EPSS (Exploit Prediction Scoring System) score of 18.5%, placing it in the 95th percentile of all CVEs. EPSS is maintained by FIRST.org and estimates the probability that a vulnerability will be exploited in the wild within the next 30 days. This score warrants monitoring and prompt remediation.

Is CVE-2016-8562 in the CISA Known Exploited Vulnerabilities catalog?

Yes. CVE-2016-8562 (Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability) was added to CISA's Known Exploited Vulnerabilities (KEV) catalog on 2022-03-03. CISA required all US federal civilian agencies to remediate this vulnerability by 2022-03-24. The required action was: Apply updates per vendor instructions. Being listed in the KEV catalog is the strongest possible confirmation of active exploitation — treat this as a critical priority.

Which products and versions are affected by CVE-2016-8562?

CVE-2016-8562 affects siemens simatic cp 1543-1 firmware; siemens siplus net cp 1543-1 firmware. Check the affected-products list on this page against your deployed version to confirm exposure.

When was CVE-2016-8562 published, and has it been updated?

CVE-2016-8562 was published on November 18, 2016 and was last updated on April 21, 2026. Advisory data evolves as severity scores, affected ranges, and exploit intelligence are revised — always check the latest version of the advisory before acting.

CISA KEV·Added 2022-03-03 — agencies required to remediate by 2022-03-24

CVE-2016-8562

HIGH

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…

Published

Nov 18, 2016

Updated

Apr 21, 2026

Affected

0 pkgs

Patched

None yet

Exploits

1 known

EPSS Exploitation Probability

via FIRST.org ↗

18.5%probability of exploitation in next 30 days

Moderate Risk95th percentile0.00%

EPSS (Exploit Prediction Scoring System) is a daily probability model maintained by FIRST.org. It estimates the likelihood a CVE will be exploited in production environments within the next 30 days, derived from real-world threat intelligence signals.

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.

Affected Products

2 products · 2 configurations

simatic cp 1543-1 firmwaresiemens

< 2.0.28

range

siplus net cp 1543-1 firmwaresiemens

< 2.0.28

range

Exploits & PoCs

Research use only. For defensive security, authorized penetration testing, and academic research only. Never execute exploit code against systems without explicit written authorization.

A vulnerability has been identified in SIMATIC CP 1543-1 (All versions <…

cisa.govCISAMar 2022

Frequently Asked Questions

O3 Security · Impact-Aware SCA

Is CVE-2016-8562 in your stack?

O3 detects CVE-2016-8562 across dependencies and uses function-level reachability to confirm whether the vulnerable code path is actually reachable — not just present. No false positives.

Scan my stack How O3 SCA works