What’s Vulnerable › Vulnerabilities

CVE-2026-31983: Missing authentication in SSH keys synchronization endpoint in Guardian/CMC before 26.2.0

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-07-09 · updated 2026-08-11
• Weakness: CWE-306

Description

A Missing Authentication vulnerability was discovered in the SSH keys synchronization endpoint. An unauthenticated attacker can send a request to the SSH keys synchronization endpoint and obtain the list of users that have uploaded their public SSH keys, their groups, and the uploaded public SSH keys.

Affected products

• Nozomi Networks CMC: before 26.2.0 — fixed in 26.2.0
• Nozomi Networks Guardian: before 26.2.0 — fixed in 26.2.0

How to fix

Upgrade to a fixed version: Nozomi Networks CMC 26.2.0; Nozomi Networks Guardian 26.2.0. Check the vendor advisory for mitigations.

References

• https://security.nozominetworks.com/NN-2026:10-01
• https://cert-portal.siemens.com/productcert/html/ssa-827968.html

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