CVE-2025-40798
published 2025-09-09CVE-2025-40798: A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SIMATIC PCS neo V6.0 (All versions < V6.0 SP1…
PriorityP343high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
EPSS
0.54%
45.2th percentile
A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), SIMATIC PCS neo V6.0 (All versions < V6.0 SP1 Update 1), User Management Component (UMC) (All versions < V2.15.1.3). Affected products contain a out-of-bounds read vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.
Affected
7 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| siemens | simatic_pcs_neo | — | — |
| siemens | simatic_pcs_neo | — | — |
| siemens | simatic_pcs_neo_v4.1 | < * | * |
| siemens | simatic_pcs_neo_v5.0 | < * | * |
| siemens | simatic_pcs_neo_v6.0 | < V6.0 SP1 Update 1 | V6.0 SP1 Update 1 |
| siemens | user_management_component | < V2.15.1.3 | V2.15.1.3 |
| siemens | user_management_component | < 2.15.1.3 | 2.15.1.3 |
CVSS provenance
nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
nvdv4.08.7HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/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
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CISA ICS
Siemens User Management Component (UMC)
cisa_ics·2025-09-11·CVSS 9.8
[CRITICAL] Siemens User Management Component (UMC)
ICS Advisory
##
Siemens User Management Component (UMC)
Release DateSeptember 11, 2025
Alert CodeICSA-25-254-07
Related topics:
Industrial Control System Vulnerabilities, Industrial Control Systems
As of January 10, 2023, CISA will no longer be updating ICS security advisories for Siemens product vulnerabilities beyond the initial advisory. For the most up-to-date information on vulnerabilities in this advisory, please see Siemens' ProductCERT Security Advisories (CERT Services | Services | Siemens Global).
View CSAF
## 1. EXECUTIVE SUMMARY
- CVSS v4 9.3
- ATTENTION: Exploitable remotely/low attack complexity
- Vendor: Siemens
- Equipment: User Management Component (UMC)
- Vulnerabilities: Stack-based Buffer Overflow, Out-of-bounds Read
## 2. RISK EVALU
VulDB
Siemens SIMATIC PCS neo 4.1/5.0 User Management out-of-bounds (ssa-722410)
vuldb·2026-10-25·CVSS 7.5
CVE-2025-40798 [HIGH] Siemens SIMATIC PCS neo 4.1/5.0 User Management out-of-bounds (ssa-722410)
A vulnerability was found in Siemens SIMATIC PCS neo 4.1/5.0. It has been rated as problematic. This vulnerability affects unknown code of the component User Management Component. The manipulation leads to out-of-bounds read.
This vulnerability is listed as CVE-2025-40798. The attack may be initiated remotely. There is no available exploit.
Upgrading the affected component is advised.
GHSA
GHSA-4prv-95gp-pq3p: A vulnerability has been identified in SIMATIC PCS neo V4
ghsa_unreviewed·2025-09-09
CVE-2025-40798 [HIGH] CWE-125 GHSA-4prv-95gp-pq3p: A vulnerability has been identified in SIMATIC PCS neo V4
A vulnerability has been identified in SIMATIC PCS neo V4.1 (All versions), SIMATIC PCS neo V5.0 (All versions), User Management Component (UMC) (All versions < V2.15.1.3). Affected products contain a out-of-bounds read vulnerability in the integrated UMC component. This could allow an unauthenticated remote attacker to cause a denial of service condition.
No detection rules found.
No public exploits indexed.
2025-09-09
Published