Deserialization in Siemens Simatic S7-plcsim V17
CVE-2025-40759
A vulnerability has been identified in SIMATIC S7-PLCSIM V17 (All versions), SIMATIC STEP 7 V17 (All versions < V17 Update 9), SIMATIC STEP 7 V18 (All versions), SIMATIC STEP 7 V19 (All versions < V19 Update 4), SIMATIC STEP 7 V20 (All ver…
Vulnerability class: Insecure Deserialization
EPSS: 0.002 (36.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.
Affected products
- Siemens Simatic S7-plcsim V17 — versions 0
- Siemens Simatic Step 7 V17 — versions 0
- Siemens Simatic Step 7 V18 — versions 0
- Siemens Simatic Step 7 V19 — versions 0
- Siemens Simatic Step 7 V20 — versions 0
- Siemens Simatic Wincc V17 — versions 0
- Siemens Simatic Wincc V18 — versions 0
- Siemens Simatic Wincc V19 — versions 0
- Siemens Simatic Wincc V20 — versions 0
- Siemens Simocode Es V17 — versions 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2025-40759?
- CVE-2025-40759 is a high-severity vulnerability in Siemens Simatic S7-plcsim V17, classified under Deserialization of Untrusted Data. CVSS score: 7.8/10. Published 2025-08-12.
- How severe is CVE-2025-40759?
- High severity. CVSS v3 base score is 7.8 out of 10.