Is CVE-2021-20077 being actively exploited?

CVE-2021-20077 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2021-20077?

CVE-2021-20077 has a CVSS 3.1 base score of 6.7 (MEDIUM).

CVE-2021-20077

MEDIUM · CVSS 6.7EPSS 0.3%EU EUVD

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.

Key facts

CVSS score: 6.7 (v3.1)
Severity: MEDIUM
CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS score: 0.3% (26th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2021-7539)
Published: March 19, 2021
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-7539 in the EU Vulnerability Database. Last updated in EUVD on August 3, 2024.

View on the EU Vulnerability Database

Affected products

tenable / nessus agent

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Nessus Agent 8.0.0 - Tenable, Inc. - Common Criteria CCEVS-VR-VID-11066-2020 - archived

References

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

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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