CVE-2021-20077

Name: CVE-2021-20077
Creator: NVD / NIST
Published: 2021-03-19T19:15:13.497+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.7/10EPSS 0.35%

Last modified Jun 17, 2026

CVE-2021-20077 is a medium-severity vulnerability rated 6.7/10 on the CVSS scale. 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.. EPSS estimates a 0.35% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.7/10

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.35%

26.5th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Tenable	Nessus Agent	>= 7.2.0, < 8.2.3

References

https://www.tenable.com/security/tns-2021-04-0Patch, Vendor Advisory
https://www.tenable.com/security/tns-2021-04-0Patch, Vendor Advisory
https://www.tenable.com/security/tns-2021-04-0Patch, Vendor Advisory
https://www.tenable.com/security/tns-2021-04-0Patch, Vendor Advisory
https://www.tenable.com/security/tns-2021-07Not Applicable, Vendor Advisory
https://www.tenable.com/security/tns-2021-04-0Patch, Vendor Advisory
https://www.tenable.com/security/tns-2021-04-0Patch, Vendor Advisory
https://www.tenable.com/security/tns-2021-04-0Patch, Vendor Advisory
https://www.tenable.com/security/tns-2021-04-0Patch, Vendor Advisory
https://www.tenable.com/security/tns-2021-07Not Applicable, Vendor Advisory

Timeline

Published: Mar 19, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-20077?

How severe is CVE-2021-20077?

CVE-2021-20077 has a CVSS score of 6.7/10 (MEDIUM severity). The EPSS model estimates a 0.35% probability of exploitation in the next 30 days.

How do I fix CVE-2021-20077?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-20077?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST