CVE-2025-40897: Nozomi Networks Guardian and CMC incorrect authorization in Threat Intelligence

CVE-2025-40897 · Severity: high · CVSS 8.1 · Published 2026-04-15

Nozomi Networks Guardian and CMC are industrial cybersecurity platforms used to monitor and protect critical infrastructure networks. A security flaw in the Threat Intelligence module allows users who should only have 'view-only' access to perform administrative tasks. This means a low-privileged user could modify security rules or disable threat detection features, potentially leaving the industrial environment unprotected against cyber threats.

Technologies: Nozomi Networks Central Management Console, Nozomi Networks Guardian, Siemens Ruggedcom Ape1808. Vendors: Nozomi Networks, Siemens.

Quick answers

Is CVE-2025-40897 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2025-40897 being exploited in the wild.
How severe is CVE-2025-40897?
High severity, with a CVSS score of 8.1, published 15 April 2026.
Which products and versions are affected?
Nozomi Networks Central Management Console < 26.0.0; Nozomi Networks Guardian < 26.0.0; Siemens Ruggedcom Ape1808 < 26.2.0.
Is there a fix for CVE-2025-40897?
A patch was published on 2026-04-15: Nozomi Networks released version 26.0.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
How is CVE-2025-40897 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2025-40897?
Check whether you run Nozomi Networks Central Management Console, Nozomi Networks Guardian or Siemens Ruggedcom Ape1808 at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

An incorrect authorization vulnerability (CWE-863) exists in the Threat Intelligence component of Nozomi Networks Guardian and CMC. The application fails to properly enforce access restrictions for users assigned view-only permissions. An authenticated attacker with these limited privileges can bypass intended restrictions to perform administrative actions, such as altering rule configurations or impacting the availability of threat intelligence services. The vulnerability is reachable over the network without user interaction. Nozomi Networks has released version 26.0.0 to address this issue, while Siemens recommends upgrading RUGGEDCOM APE1808 deployments to version 26.2.0.

Affected products

  • Nozomi Networks Guardian < 26.0.0
  • Nozomi Networks Central Management Console (CMC) < 26.0.0
  • Siemens RUGGEDCOM APE1808 (Nozomi Guardian/CMC) < 26.2.0

Timeline

  • 2026-01-13: advisory: Initial Siemens advisory publication
  • 2026-04-15: disclosed: Nozomi Networks advisory published
  • 2026-04-15: patched: Nozomi Networks released version 26.0.0
  • 2026-05-12: other: Siemens advisory updated

References

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