High 7.8Published Aug 12, 2025

CVE-2025-40759A 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 < V18 Update 6), SIMATIC STEP 7 V19 (Al…

Updated under an hour ago (Oct 28, 2026, 9:00 PM ET)

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It affects Siemens SIMATIC S7-PLCSIM V17 and 32 other products. Add what you run to find out whether that includes you.

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Every CVE for Siemens SIMATIC S7-PLCSIM V17

Exploited in the last 30 days

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 < V18 Update 6), SIMATIC STEP 7 V19 (All versions < V19 Update 4), SIMATIC STEP 7 V20 (All versions < V20 Update 4), SIMATIC WinCC V17 (All versions < V17 Update 9), SIMATIC WinCC V18 (All versions < V18 Update 6), SIMATIC WinCC V19 (All versions < V19 Update 4), SIMATIC WinCC V20 (All versions < V20 Update 4), SIMOCODE ES V17 (All versions), SIMOCODE ES V18 (All versions), SIMOCODE ES V19 (All versions), SIMOCODE ES V20 (All versions), SIMOTION SCOUT TIA V5.4 (All versions), SIMOTION SCOUT TIA V5.5 (All versions), SIMOTION SCOUT TIA V5.6 (All versions < V5.6 SP1 HF7), SIMOTION SCOUT TIA V5.7 (All versions), SINAMICS Startdrive V17 (All versions), SINAMICS Startdrive V18 (All versions), SINAMICS Startdrive V19 (All versions), SINAMICS Startdrive V20 (All versions), SIRIUS Safety ES V17 (TIA Portal) (All versions), SIRIUS Safety ES V18 (TIA Portal) (All versions), SIRIUS Safety ES V19 (TIA Portal) (All versions), SIRIUS Safety ES V20 (TIA Portal) (All versions), SIRIUS Soft Starter ES V17 (TIA Portal) (All versions), SIRIUS Soft Starter ES V18 (TIA Portal) (All versions), SIRIUS Soft Starter ES V19 (TIA Portal) (All versions), SIRIUS Soft Starter ES V20 (TIA Portal) (All versions), TIA Portal Cloud V17 (All versions), TIA Portal Cloud V18 (All versions), TIA Portal Cloud V19 (All versions < V5.2.1.1), TIA Portal Cloud V20 (All versions < V5.2.2.2). Affected products do not properly sanitize stored security properties when parsing project files. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application.

CVSS: 7.8 HIGH (v3.1, CNA)CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-502
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: siemens
NVD analysis: Deferred
Record last updated: Oct 13, 2026
First seen by InfoSec Signals: Oct 13, 2026

Affected products

Affected products

Siemens SIMATIC S7-PLCSIM V17 siemens:simatic_s7_plcsim_v17 (from the name)	all versions	CNA record
Siemens SIMATIC STEP 7 V17 siemens:simatic_step_7_v17 (from the name)	before V17 Update 9	CNA record
Siemens SIMATIC STEP 7 V18 siemens:simatic_step_7_v18 (from the name)	before V18 Update 6	CNA record
Siemens SIMATIC STEP 7 V19 siemens:simatic_step_7_v19 (from the name)	before V19 Update 4	CNA record
Siemens SIMATIC STEP 7 V20 siemens:simatic_step_7_v20 (from the name)	before V20 Update 4	CNA record
Siemens SIMATIC WinCC V17 siemens:simatic_wincc_v17 (from the name)	before V17 Update 9	CNA record
Siemens SIMATIC WinCC V18 siemens:simatic_wincc_v18 (from the name)	before V18 Update 6	CNA record
Siemens SIMATIC WinCC V19 siemens:simatic_wincc_v19 (from the name)	before V19 Update 4	CNA record
Siemens SIMATIC WinCC V20 siemens:simatic_wincc_v20 (from the name)	before V20 Update 4	CNA record
Siemens SIMOCODE ES V17 siemens:simocode_es_v17 (from the name)	all versions	CNA record
1–10 of 33

References

References

https://cert-portal.siemens.com/productcert/html/ssa-493396.html

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.