CyberSecBulletin
CVE-2025-40800NVD status: Deferred

COMOS V10.6: Improper Certificate Validation

Published Updated By the CyberSecBulletin desk

CVE-2025-40800 is a high-severity improper certificate validation vulnerability in COMOS V10.6 from Siemens, with a CVSS 3.1 base score of 7.4 out of 10. It can be exploited remotely over the network by an unauthenticated attacker, without any action from a user. The record lists version V10.6.1 as the first without the flaw, so updating COMOS V10.6 to that release or later removes the exposure. There is no confirmed exploitation so far. EPSS estimates a 0.21% chance of exploitation within 30 days, which is low compared with other CVEs.

Next patch cycle

High severity with no evidence of exploitation so far.

What to do

  1. Update COMOS V10.6 to V10.6.1 or a later version.
  2. Update NX V2412 to V2412.8700 or a later version.
  3. Update NX V2506 to V2506.6000 or a later version.
  4. Until you can update, restrict network access to the affected service so it is not reachable from untrusted networks.

Affected products and versions

VendorProductAffected versionsFixed in
SiemensCOMOS V10.6before V10.6.1V10.6.1
SiemensNX V2412before V2412.8700V2412.8700
SiemensNX V2506before V2506.6000V2506.6000
SiemensSimcenter 3Dbefore V2506.6000V2506.6000
SiemensSimcenter Femapbefore V2506.0002V2506.0002
SiemensSolid Edge SE2025before V225.0 Update 10V225.0 Update 10
SiemensSolid Edge SE2026before V226.0 Update 1V226.0 Update 1

Version data comes from the organisation that assigned the CVE. Confirm against the vendor advisory before deciding you are unaffected.

How the severity score breaks down

Attack vector
NetworkCan be exploited remotely over a network, including the internet.
Attack complexity
HighSuccess depends on conditions outside the attacker's control.
Privileges required
NoneNo account or login is needed.
User interaction
NoneNo action by a victim is required.
Scope
UnchangedImpact stays within the vulnerable component.
Confidentiality
HighAll data handled by the component can be read.
Integrity
HighData or code can be modified at will.
Availability
NoneAvailability is not affected.

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N. Scored by CNA (siemens.com).

Scoring systemScoreSeverityScored by
CVSS 4.09.1CriticalCNA (siemens.com)
CVSS 3.17.4HighCNA (siemens.com)

Official description

A vulnerability has been identified in COMOS V10.6 (All versions < V10.6.1), COMOS V10.6 (All versions < V10.6.1), NX V2412 (All versions < V2412.8700), NX V2506 (All versions < V2506.6000), Simcenter 3D (All versions < V2506.6000), Simcenter Femap (All versions < V2506.0002), Solid Edge SE2025 (All versions < V225.0 Update 10), Solid Edge SE2026 (All versions < V226.0 Update 1). The IAM client in affected products is missing server certificate validation while establishing TLS connections to the authorization server. This could allow an attacker to perform a man-in-the-middle attack.

Source: the CVE record as published by its numbering authority, via NVD and CVE.org.

The underlying weakness: Improper Certificate Validation

The product does not validate, or incorrectly validates, a certificate.

How developers prevent this class of flaw

  • Certificates should be carefully managed and checked to assure that data are encrypted with the intended owner's public key.
  • If certificate pinning is being used, ensure that all relevant properties of the certificate are fully validated before the certificate is pinned, including the hostname.

More Improper Certificate Validation vulnerabilities (CWE-295)

Timeline

  1. CVE record published.
  2. CISA published its SSVC assessment (exploitation: none, automatable: no, technical impact: total).
  3. Record last changed materially (score, affected products, status or references).

References

Other vulnerabilities in COMOS V10.6

All COMOS V10.6 vulnerabilities

Recent Improper Certificate Validation vulnerabilities

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