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5.4
Nessus Agent: Weak File Permissions on Windows Hosts Expose to Unauthorized Access
CVE-2026-2026
Summary
The Nessus Agent directory on Windows hosts has weak file permissions, which could allow unauthorized access and potentially lead to Denial of Service (DoS) attacks. This affects organizations that use the Nessus Agent on Windows systems. To mitigate this, ensure the Nessus Agent directory has proper permissions to prevent unauthorized access.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| tenable | nessus_agent | <= 11.0.4 | – |
| tenable | nessus_agent | > 11.1.0 , <= 11.1.2 | – |
Original title
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.
Original 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.
nvd CVSS3.1
6.1
nvd CVSS4.0
5.4
Vulnerability type
CWE-276
Incorrect Default Permissions
- https://www.tenable.com/security/tns-2026-05 Vendor Advisory
Published: 13 Feb 2026 · Updated: 10 Mar 2026 · First seen: 6 Mar 2026