Nessus Agent Weak File Perms Allow Unauthorized Access on Windows
CVE-2026-2026 Published on February 13, 2026

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.

NVD

Vulnerability Analysis

CVE-2026-2026 is exploitable with local system access, and requires small amount of user privileges. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a small impact on confidentiality, a small impact on integrity, and a high impact on availability.

Attack Vector:

LOCAL

Attack Complexity:

LOW

Privileges Required:

LOW

User Interaction:

NONE

Scope:

UNCHANGED

Confidentiality Impact:

LOW

Integrity Impact:

NONE

Availability Impact:

HIGH

Weakness Type

Incorrect Default Permissions

During installation, installed file permissions are set to allow anyone to modify those files.

Products Associated with CVE-2026-2026

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Tenable Agent

Tenable Nessus Agent

Affected Versions

Tenable Agent:

Version 11.1.0 and below 11.1.2 is affected.
Before 11.0.4 is affected.

Exploit Probability

EPSS

0.01%

Percentile

1.31%

EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.