A vulnerability has been identified in SIMATIC STEP 7 Safety V16 (All versions < V16 Update 7), SIMATIC STEP 7 Safety V17 (All versions < V…

published 2024-07-09 2 y ago modified 2026-06-17 4 mo ago also EUVD-2023-36960

cvss: 6.5; 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 11%
public exploits: 0; none known

A vulnerability has been identified in SIMATIC STEP 7 Safety V16 (All versions < V16 Update 7), SIMATIC STEP 7 Safety V17 (All versions < V17 Update 7), SIMATIC STEP 7 Safety V18 (All versions < V18 Update 2), SIMATIC STEP 7 V16 (All versions < V16 Update 7), SIMATIC STEP 7 V17 (All versions < V17 Update 7), SIMATIC STEP 7 V18 (All versions < V18 Update 2), SIMATIC WinCC Unified V16 (All versions < V16 Update 7), SIMATIC WinCC Unified V17 (All versions < V17 Update 7), SIMATIC WinCC Unified V18 (All versions < V18 Update 2), SIMATIC WinCC V16 (All versions < V16.7), SIMATIC WinCC V17 (All versions < V17.7), SIMATIC WinCC V18 (All versions < V18 Update 2), SIMOCODE ES V16 (All versions < V16 Update 7), SIMOCODE ES V17 (All versions < V17 Update 7), SIMOCODE ES V18 (All versions < V18 Update 2), 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 (All versions < V17 Update 7), SIRIUS Safety ES V18 (All versions < V18 Update 2), SIRIUS Soft Starter ES V17 (All versions < V17 Update 7), SIRIUS Soft Starter ES V18 (All versions < V18 Update 2), Soft Starter ES V16 (All versions < V16 Update 7), TIA Portal Cloud V3.0 (All versions < V18 Update 2). Affected applications do not properly restrict the .NET BinaryFormatter when deserializing hardware configuration profiles. This could allow an attacker to cause a type confusion and execute arbitrary code within the affected application.

This is the same issue that exists for .NET BinaryFormatter https://docs.microsoft.com/en-us/visualstudio/code-quality/ca2300.

Patch / fix

fixed in 30

Siemens SIMATIC STEP 7 Safety V16 V16 Update 7
Siemens SIMATIC STEP 7 Safety V17 V17 Update 7
Siemens SIMATIC STEP 7 Safety V18 V18 Update 2
Siemens SIMATIC STEP 7 V16 V16 Update 7
Siemens SIMATIC STEP 7 V17 V17 Update 7
Siemens SIMATIC STEP 7 V18 V18 Update 2
Siemens SIMATIC WinCC Unified V16 V16 Update 7
Siemens SIMATIC WinCC Unified V17 V17 Update 7
Siemens SIMATIC WinCC Unified V18 V18 Update 2
Siemens SIMATIC WinCC V16 V16.7
Siemens SIMATIC WinCC V17 V17.7
Siemens SIMATIC WinCC V18 V18 Update 2
Siemens SIMOCODE ES V16 V16 Update 7
Siemens SIMOCODE ES V17 V17 Update 7
Siemens SIMOCODE ES V18 V18 Update 2
Siemens SIRIUS Safety ES V17 V17 Update 7
Siemens SIRIUS Safety ES V18 V18 Update 2
Siemens SIRIUS Soft Starter ES V17 V17 Update 7
Siemens SIRIUS Soft Starter ES V18 V18 Update 2
Siemens Soft Starter ES V16 V16 Update 7
Siemens TIA Portal Cloud V3.0 V18 Update 2
siemens simatic_step_7_safety v16update7, v17update7, v18update2
siemens simatic_step_7 v16update7, v17update7, v18update2
siemens simatic_wincc_unified v16update7, v17update7, v18update2
siemens simatic_wincc v17.7, v18update2
siemens simocode_es v16update7, v17update7, v18update2
siemens sirius_safety_es v17update7, v18update2
siemens sirius_soft_starter_es v17update7, v18update2
siemens soft_starter_es v16update7
siemens tia_portal_cloud_v3.0 v18update2

Vendor advisories

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

cisa ICSA-24-193-13 updated 2024-07-09 cvss 6.5

Siemens TIA Portal, SIMATIC, and SIRIUS

Siemens SIMATIC STEP 7 Safety V16 <V16_Update_7
affected: fixed in V16, mitigation
Siemens SIMATIC STEP 7 Safety V17 <V17_Update_7
affected: fixed in V17, mitigation
Siemens SIMATIC STEP 7 Safety V18 <V18_Update_2
affected: fixed in V18, mitigation
Siemens SIMATIC STEP 7 V16 <V16_Update_7
affected: fixed in V16, mitigation
Siemens SIMATIC STEP 7 V17 <V17_Update_7
affected: fixed in V17, mitigation
Siemens SIMATIC STEP 7 V18 <V18_Update_2
affected: fixed in V18, mitigation
Siemens SIMATIC WinCC Unified V16 <V16_Update_7
affected: fixed in V16, mitigation
Siemens SIMATIC WinCC Unified V17 <V17_Update_7
affected: fixed in V17, mitigation

show 14 more

Siemens SIMATIC WinCC Unified V18 <V18_Update_2
affected: fixed in V18, mitigation
Siemens SIMATIC WinCC V16 <V16.7
affected: fixed in V16.7, mitigation
Siemens SIMATIC WinCC V17 <V17.7
affected: fixed in V17.7, mitigation
Siemens SIMATIC WinCC V18 <V18_Update_2
affected: fixed in V18, mitigation
Siemens SIMOCODE ES V16 <V16_Update_7
affected: fixed in V16, mitigation
Siemens SIMOCODE ES V17 <V17_Update_7
affected: fixed in V17, mitigation
Siemens SIMOCODE ES V18 <V18_Update_2
affected: fixed in V18, mitigation
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
affected: mitigation, no fix planned
Siemens SIRIUS Safety ES V17 <V17_Update_7
affected: fixed in V17, mitigation
Siemens SIRIUS Safety ES V18 <V18_Update_2
affected: fixed in V18, mitigation
Siemens SIRIUS Soft Starter ES V17 <V17_Update_7
affected: fixed in V17, mitigation
Siemens SIRIUS Soft Starter ES V18 <V18_Update_2
affected: fixed in V18, mitigation
Siemens Soft Starter ES V16 <V16_Update_7
affected: fixed in V16, mitigation
Siemens TIA Portal Cloud V3.0 <V18_Update_2
affected: fixed in V18, 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: 2 y ago (2024-07-09)

Exploit prediction

0.21% chance of exploitation in the next 30 days, higher than 11% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	6.5	CVSS:3.1/AV:L/AC:L/PR:H/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:H/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:H/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	6.5	CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H

Affected products

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
Siemens SIRIUS Safety ES V18
Siemens SIRIUS Soft Starter ES V17
Siemens SIRIUS Soft Starter ES V18
Siemens Soft Starter ES V16
Siemens TIA Portal Cloud V3.0
siemens simatic_step_7_safety
siemens simatic_step_7
siemens simatic_wincc_unified
siemens simatic_wincc
siemens simocode_es
siemens simotion_scout_tia
siemens sinamics_startdrive
siemens sirius_safety_es
siemens sirius_soft_starter_es
siemens soft_starter_es
siemens tia_portal_cloud_v3.0

Classification

Weakness

CWE-502 Deserialization of Untrusted Data

References

cert-portal.siemens.com /productcert/html/ssa-779936.html

Sources

CVE List CVE-2023-32735
NVD CVE-2023-32735

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