---
id: "CVE-2016-8562"
kind: "vulnerability"
aliases: ["CVE-2016-8562"]
title: "Siemens SIMATIC CP: Siemens SIMATIC CP 1543-1 Improper Privilege Management Vulnerability"
severity: "high"
cvss: 7.5
epss: 0.0361
exploited: true
status: "open"
category: "infrastructure"
products: [{"name": "Siemens SIMATIC CP", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["exploited", "industrial-control", "infrastructure", "plc", "siemens", "simatic"]
not_affected_if: ["no-simatic-cp-1543-1"]
published_at: "2016-11-18T21:59:02+00:00"
first_seen_at: "2026-10-23T19:11:52+00:00"
updated_at: "2026-10-23T21:57:35+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2016-8562", "first_seen_at": "2026-10-23T19:11:52+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2016-8562", "first_seen_at": "2026-10-23T19:13:44+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2016-8562", "first_seen_at": "2026-10-23T21:57:35+00:00"}]
---

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

Siemens SIMATIC CP 1543-1 industrial communication processors have an improper privilege management flaw. A privileged remote attacker can crash or disable the device, causing a denial of service.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:Siemens SIMATIC CP affected ? fixed ?

## Fix

Apply the updates per Siemens vendor instructions; CISA required action is to apply vendor updates. Affected and fixed versions: unknown

## Timeline

- 2026-10-23T19:11:52+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2016-8562
- 2026-10-23T19:13:44+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2016-8562
- 2026-10-23T21:57:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2016-8562

## From the sources

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_