CVE-2026-33920: Nozomi Networks Guardian and CMC cross-site request forgery in login

CVE-2026-33920 · Severity: low · CVSS 3.5 · Published 2026-09-08

Guardian and CMC are network security monitoring and management platforms used by industrial and enterprise organizations. A CSRF vulnerability in the login functionality allows an attacker with a valid account to trick a victim into unknowingly authenticating as the attacker, causing all subsequent actions to be attributed to the attacker's account and compromising the audit trail.

Technologies: Nozomi Networks Guardian. Vendors: Nozomi Networks.

Quick answers

Is CVE-2026-33920 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-33920 being exploited in the wild.
How severe is CVE-2026-33920?
Low severity, with a CVSS score of 3.5, published 8 September 2026.
Which products and versions are affected?
Nozomi Networks Guardian before 26.3.0.
Is there a fix for CVE-2026-33920?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-33920 attacked?
It is attacked over the network.
Am I affected by CVE-2026-33920?
Check whether you run Nozomi Networks Guardian 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

This is a cross-site request forgery (CWE-352) vulnerability in the login functionality of Guardian and CMC resulting from missing validation of anti-CSRF tokens for both standard and SAML-based authentication. The attack requires the attacker to have a valid account and the victim to interact with a malicious webpage while authenticated to the target system. An authenticated attacker can forge login requests that cause a victim to unknowingly assume the attacker's identity, leading to operation attribution, audit trail compromise, and potential unauthorized access. The vulnerability affects versions before 26.3.0; patched versions are available.

Affected products

  • Nozomi Networks Guardian before 26.3.0
  • Nozomi Networks CMC before 26.3.0

Timeline

  • 2026-09-08: disclosed

References

This page as Markdown. Free to reuse under CC BY 4.0 with a link back.