Weak File Permissions in Nessus Agent on Windows Systems
CVE-2026-2026

5.4MEDIUM

Key Information:

Vendor

Tenable

Status
Agent
Vendor
CVE Published:
13 February 2026

What is CVE-2026-2026?

A specific vulnerability has been discovered in the Nessus Agent for Windows, stemming from inadequate file permissions in its installation directory. This flaw could allow malicious actors to gain unauthorized access to sensitive areas of the system, ultimately facilitating Denial of Service attacks. Ensuring that the file permissions are correctly configured is vital to maintain the security integrity of the Nessus Agent and the underlying Windows host.

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Affected Version(s)

Agent Windows 11.1.0

Agent Windows 11.1.0 < 11.1.2

Agent Windows 0 < 11.0.4

References

https://www.tenable.com/security/tns-2026-05

CVSS V4

Score:
5.4
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
None
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Lockheed Martin Red Team
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