CVE-2020-5774: Tenable Nessus

High severity, CVSS 7.1. EPSS: 0.3% chance of exploitation in the next 30 days.

Nessus versions 8.11.0 and earlier were found to maintain sessions longer than the permitted period in certain scenarios. The lack of proper session expiration could allow attackers with local access to login into an existing browser session.

Affected products

• Tenable Nessus: up to and including 8.11.0

Published 2020-08-21. Last modified 2026-06-17.