CVE-2021-20077 Information disclosure in Tenable Nessus Agent

What is CVE-2021-20077?

CVE-2021-20077 is a medium-severity vulnerability in Tenable Nessus Agent, published on 19 Mar 2021. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Nessus Agent versions 7.2.0 through 8.2.2 were found to inadvertently capture the IAM role security token on the local host during initial linking of the Nessus Agent when installed on an Amazon EC2 instance. This could allow a privileged attacker to obtain the token.

Which versions are affected by CVE-2021-20077?

It affects 1 product.

Products include Tenable Nessus Agent.

How do I fix CVE-2021-20077?

No fix has been published for CVE-2021-20077 yet. Limit exposure of the affected software until one is available.

Is CVE-2021-20077 being exploited?

There is no known exploitation of CVE-2021-20077 in the wild and no public exploit code.

Other vulnerabilities in Tenable Nessus 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-fh62-2wf5-r836.