Siemens SIMATIC PCS neo 4.1/5.0 User Management out-of-bounds

CVSS Meta Temp Score
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CTI Interest Score
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6.3$0-$5k0.64

Summaryinfo

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. This vulnerability is listed as CVE-2025-40797. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is advised.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in Siemens SIMATIC PCS neo 4.1/5.0. This issue affects an unknown function of the component User Management Component. The manipulation with an unknown input leads to a out-of-bounds vulnerability. Using CWE to declare the problem leads to CWE-125. The product reads data past the end, or before the beginning, of the intended buffer. Impacted is availability. The summary by CVE is:

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.

It is possible to read the advisory at cert-portal.siemens.com. The identification of this vulnerability is CVE-2025-40797 since 04/16/2025. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 265964 (Siemens User Management Component Out-of-bounds Read DoS (CVE-2025-40797)), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (265964). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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Version

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 6.4
VulDB Meta Temp Score: 6.3

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (siemens): 🔒

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Out-of-bounds
CWE: CWE-125 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Nessus ID: 265964
Nessus Name: Siemens User Management Component Out-of-bounds Read DoS (CVE-2025-40797)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

04/16/2025 CVE reserved
09/09/2025 +146 days Advisory disclosed
09/09/2025 +0 days VulDB entry created
06/09/2026 +273 days VulDB entry last update

Sourcesinfo

Vendor: siemens.com

Advisory: ssa-722410
Status: Confirmed

CVE: CVE-2025-40797 (🔒)
GCVE (CVE): GCVE-0-2025-40797
GCVE (VulDB): GCVE-100-323183

Entryinfo

Created: 09/09/2025 12:12
Updated: 06/09/2026 13:09
Changes: 09/09/2025 12:12 (77), 09/27/2025 08:25 (2), 06/09/2026 13:09 (1)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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