A vulnerability has been identified in SIMATIC S7-PLCSIM V16 (All versions), SIMATIC S7-PLCSIM V17 (All versions), SIMATIC STEP 7 Safety V1…

published 2024-11-12 23 mo ago modified 2026-06-17 4 mo ago also EUVD-2023-36961

cvss: 7.3; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.2%; EPSS 0.2% chance of exploitation in 30 days, percentile 12%
public exploits: 0; none known

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.

Patch / fix

fixed in 20

Siemens SIMATIC STEP 7 Safety V17 V17 Update 8
Siemens SIMATIC STEP 7 Safety V18 V18 Update 5
Siemens SIMATIC STEP 7 V17 V17 Update 8
Siemens SIMATIC STEP 7 V18 V18 Update 5
Siemens SIMATIC WinCC Unified V17 V17 Update 8
Siemens SIMATIC WinCC Unified V18 V18 SP5
Siemens SIMATIC WinCC V17 V17 Update 8
Siemens SIMATIC WinCC V18 V18 SP5
Siemens SIMOCODE ES V17 V17 Update 8
Siemens SIRIUS Safety ES V17 (TIA Portal) V17 Update 8
Siemens SIRIUS Soft Starter ES V17 (TIA Portal) V17 Update 8
Siemens TIA Portal Cloud V17 V4.6.0.1
Siemens TIA Portal Cloud V18 V4.6.1.0
siemens simatic_step_7 17, 17_update8, 18_update5
siemens simatic_s7-plcsim 17
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

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

cisa ICSA-24-319-07 updated 2025-05-06 cvss 7.3

Siemens Engineering Platforms

Siemens SIMATIC S7-PLCSIM V16 Siemens SIMATIC S7-PLCSIM V17 Siemens SIMATIC STEP 7 Safety V16
affected: mitigation, no fix planned
Siemens SIMATIC STEP 7 Safety V17 <V17_Update_8
affected: fixed in V17, mitigation
Siemens SIMATIC STEP 7 Safety V18 <V18_Update_5
affected: fixed in V18, mitigation
Siemens SIMATIC STEP 7 V16
affected: mitigation, no fix planned
Siemens SIMATIC STEP 7 V17 <V17_Update_8
affected: fixed in V17, mitigation
Siemens SIMATIC STEP 7 V18 <V18_Update_5
affected: fixed in V18, mitigation
Siemens SIMATIC WinCC Unified V16
affected: mitigation, no fix planned
Siemens SIMATIC WinCC Unified V17 <V17_Update_8
affected: fixed in V17, mitigation

show 19 more

Siemens SIMATIC WinCC Unified V18 <V18_SP5
affected: fixed in V18, mitigation
Siemens SIMATIC WinCC V16
affected: mitigation, no fix planned
Siemens SIMATIC WinCC V17 <V17_Update_8
affected: fixed in V17, mitigation
Siemens SIMATIC WinCC V18 <V18_SP5
affected: fixed in V18, mitigation
Siemens SIMOCODE ES V16
affected: mitigation, no fix planned
Siemens SIMOCODE ES V17 <V17_Update_8
affected: fixed in V17, mitigation
Siemens SIMOCODE ES V18
affected: fixed in V18, mitigation support.industry.siemens.com
Siemens SIMOTION SCOUT TIA V5.4 SP1
affected: mitigation, no fix planned
Siemens SIMOTION SCOUT TIA V5.4 SP3
affected: fixed in V17, mitigation support.industry.siemens.com
Siemens SIMOTION SCOUT TIA V5.5 SP1
affected: fixed in V18, mitigation support.industry.siemens.com
Siemens SINAMICS Startdrive V16
affected: mitigation, no fix planned
Siemens SINAMICS Startdrive V17
affected: fixed in V17, mitigation support.industry.siemens.com
Siemens SINAMICS Startdrive V18
affected: fixed in V18, mitigation support.industry.siemens.com
Siemens SIRIUS Safety ES V17 (TIA Portal) <V17_Update_8
affected: fixed in V17, mitigation
Siemens SIRIUS Safety ES V18 (TIA Portal)
affected: fixed in V18, mitigation support.industry.siemens.com
Siemens SIRIUS Soft Starter ES V17 (TIA Portal) <V17_Update_8
affected: fixed in V17, mitigation
Siemens SIRIUS Soft Starter ES V18 (TIA Portal)
affected: fixed in V18, mitigation support.industry.siemens.com
Siemens TIA Portal Cloud V16
affected: mitigation, no fix planned
Siemens TIA Portal Cloud V17 <V4.6.0.1 Siemens TIA Portal Cloud V18 <V4.6.1.0
affected: vendor fix, mitigation

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 23 mo ago (2024-12-02)

Exploit prediction

0.22% chance of exploitation in the next 30 days, higher than 12% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	7.3	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
CNA	4.0	7.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CNA	4.0	7.0	CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CNA	3.1	7.3	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H

Affected products

Siemens SIMATIC S7-PLCSIM V16
Siemens SIMATIC S7-PLCSIM V17
Siemens SIMATIC STEP 7 Safety V16
Siemens SIMATIC STEP 7 Safety V17
Siemens SIMATIC STEP 7 Safety V18
Siemens SIMATIC STEP 7 V16
Siemens SIMATIC STEP 7 V17
Siemens SIMATIC STEP 7 V18
Siemens SIMATIC WinCC Unified V16
Siemens SIMATIC WinCC Unified V17
Siemens SIMATIC WinCC Unified V18
Siemens SIMATIC WinCC V16
Siemens SIMATIC WinCC V17
Siemens SIMATIC WinCC V18
Siemens SIMOCODE ES V16
Siemens SIMOCODE ES V17
Siemens SIMOCODE ES V18
Siemens SIMOTION SCOUT TIA V5.4 SP1
Siemens SIMOTION SCOUT TIA V5.4 SP3
Siemens SIMOTION SCOUT TIA V5.5 SP1
Siemens SINAMICS Startdrive V16
Siemens SINAMICS Startdrive V17
Siemens SINAMICS Startdrive V18
Siemens SIRIUS Safety ES V17 (TIA Portal)
Siemens SIRIUS Safety ES V18 (TIA Portal)
Siemens SIRIUS Soft Starter ES V17 (TIA Portal)
Siemens SIRIUS Soft Starter ES V18 (TIA Portal)
Siemens TIA Portal Cloud V16
Siemens TIA Portal Cloud V17
Siemens TIA Portal Cloud V18
siemens simatic_step_7
siemens simatic_s7-plcsim
siemens simatic_wincc
siemens simatic_wincc_unified
siemens simocode_es
siemens simotion_scout_tia
siemens sinamics_startdrive
siemens sirius_safety_es
siemens tia_portal_cloud

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

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

Sources

CVE List CVE-2023-32736
NVD CVE-2023-32736

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary