CVE-2026-2026 Improper Access Control Allows Denial of Service

What is CVE-2026-2026?

CVE-2026-2026 is a medium-severity vulnerability in Tenable Agent, published on 13 Feb 2026. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

A vulnerability has been identified where weak file permissions in the Nessus Agent directory on Windows hosts could allow unauthorized access, potentially permitting Denial of Service (DoS) attacks.

Weakness: CWE-276

Which versions are affected by CVE-2026-2026?

It affects 1 product.

Products include Tenable Nessus Agent.

How do I fix CVE-2026-2026?

No fix has been published for CVE-2026-2026 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-2026 being exploited?

There is no known exploitation of CVE-2026-2026 in the wild and no public exploit code.

Other vulnerabilities in Tenable Agent

• CVE-2026-15265 Tenable Agent Path Traversal Leading to Remote Code Execution Critical 9.3
• CVE-2025-36633 Local Privilege Escalation High 8.8
• CVE-2025-36631 Local Privilege Escalation High 8.4
• CVE-2025-36632 Local Privilege Escalation High 7.8
• CVE-2021-20117 Privilege escalation in Nessus Agent Medium 6.7

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-w7w9-2vjv-7r67.