CVE-2023-32736

Severity: high (CVSS 7.3 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2024-11-12 · updated 2026-06-17
Weakness: CWE-502

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.

Affected products

Siemens SIMATIC S7-PLCSIM V5.4: from 16 before 17; from 17 — fixed in 17
Siemens SIMATIC STEP 7 (TIA Portal): from 16 before 17; from 17 before 17_update8; from 18 before 18_update5 — fixed in 17, 17_update8, 18_update5
Siemens Simatic Wincc: from 16 before 17; from 17 before 17_update8; from 18 before 18_update5 — fixed in 17, 17_update8, 18_update5
Siemens Simatic Wincc Unified: from 16 before 17; from 17 before 17_update8; from 18 before 18_update5 — fixed in 17, 17_update8, 18_update5
Siemens Simocode Es: from 16 before 17; from 17 before 17_update8; from 18 — fixed in 17, 17_update8
Siemens Simotion Scout Tia: from v5.4sp1; from v5.4sp3; from v5.5sp1
Siemens SINAMICS Startdrive: from 16 before 17; from 17 before 18; from 18 — fixed in 17, 18
Siemens Sirius Safety Es: before 17_update8; from 18 — fixed in 17_update8
Siemens Tia Portal Cloud: from 16; from 17; from 18

How to fix

Upgrade to a fixed version: Siemens SIMATIC S7-PLCSIM V5.4 17; Siemens SIMATIC STEP 7 (TIA Portal) 17, 17_update8, 18_update5; Siemens Simatic Wincc 17, 17_update8, 18_update5; Siemens Simatic Wincc Unified 17, 17_update8, 18_update5; Siemens Simocode Es 17, 17_update8; Siemens SINAMICS Startdrive 17, 18; Siemens Sirius Safety Es 17_update8. Check the vendor advisory for mitigations.

References

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

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