CVE-2026-31982: Nozomi Networks Guardian and CMC open redirect in SAML SSO

CVE-2026-31982 · Severity: high · CVSS 7.1 · Published 2026-07-09

A security vulnerability exists in Nozomi Networks Guardian and CMC appliances, which are used to monitor and manage industrial control systems. An attacker can manipulate the login process to redirect legitimate users to malicious websites or disrupt their ability to log in entirely. This could be used to steal employee credentials or prevent administrators from accessing the management console during an incident.

Technologies: Nozomi Networks Guardian. Vendors: Nozomi Networks.

Quick answers

Is CVE-2026-31982 exploited in the wild?
No. Junglewise Threat Intelligence has no report of CVE-2026-31982 being exploited in the wild.
How severe is CVE-2026-31982?
High severity, with a CVSS score of 7.1, published 9 July 2026.
Which products and versions are affected?
Nozomi Networks Guardian < 26.2.0.
Is there a fix for CVE-2026-31982?
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-2026-31982 attacked?
It is attacked over the network, in a network appliance.
Am I affected by CVE-2026-31982?
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

An open redirect vulnerability (CWE-601) exists in the SAML Single Sign-On (SSO) implementation of Nozomi Networks Guardian and CMC. The flaw stems from insufficient validation of a user-controlled redirection parameter at the SAML sign-in endpoint. An unauthenticated remote attacker can craft a malicious request that poisons the cached SAML redirection for subsequent users. Successful exploitation allows an attacker to redirect users to arbitrary external domains to facilitate phishing or credential theft, and can also be used to disrupt the authentication flow for all users. The issue is resolved in version 26.2.0.

Affected products

  • Nozomi Networks Guardian < 26.2.0
  • Nozomi Networks CMC < 26.2.0

Timeline

  • 2026-07-07: advisory: Initial vendor advisory released
  • 2026-07-09: disclosed: NVD publication date

References

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