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

Source: https://junglewise.ai/threats/cve-2016-8562-siemens-simatic-cp-1543-1-improper-privilege-management  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2022-03-03. Updated: 2026-05-10  
License: CC BY 4.0 with a link back

CVE-2016-8562 · Severity: critical · CVSS 7.5 · Exploited in the wild · Published 2022-03-03

Siemens SIMATIC CP 1543-1 and SIPLUS NET CP 1543-1 devices contain an improper privilege management vulnerability where SNMP variables on port 161/udp that should be read-only can be written to. A privileged attacker can exploit this to remotely cause a denial-of-service or reduce system availability.

Vendors: [Siemens](https://junglewise.ai/threats/vendors/siemens).

## Quick answers

**Is CVE-2016-8562 exploited in the wild?** Yes. CVE-2016-8562 is known to be exploited in the wild, first recorded on 3 March 2022. Treat it as urgent.

**How severe is CVE-2016-8562?** Critical severity, with a CVSS score of 7.5, published 3 March 2022.

**Which products and versions are affected?** Siemens SIMATIC CP 1543-1 All versions < V2.0.28; Siemens SIPLUS NET CP 1543-1 All versions < V2.0.28.

**Is there a fix for CVE-2016-8562?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2016-8562 attacked?** It is attacked over the network, in device firmware.

**Am I affected by CVE-2016-8562?** Check whether you run Siemens SIMATIC CP. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Affected products

- Siemens SIMATIC CP 1543-1 All versions < V2.0.28
- Siemens SIPLUS NET CP 1543-1 All versions < V2.0.28

## Timeline

- 2016-11-17: disclosed: Initial security focus and advisory publication date based on external references
- 2022-03-03: kev added: Date added to CISA's Known Exploited Vulnerabilities Catalog
- 2022-03-03: disclosed: NVD publication date