CVE-2021-26622

Name: CVE-2021-26622
Creator: NVD / NIST
Published: 2022-03-25T19:15:08.837+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 10/10EPSS 2.85%

Last modified Jun 17, 2026

CVE-2021-26622 is a critical-severity vulnerability rated 10/10 on the CVSS scale. An remote code execution vulnerability due to SSTI vulnerability and insufficient file name parameter validation was discovered in Genian NAC. Remote attackers are able to execute arbitrary malicious code with SYSTEM privileges on all connected nodes in NAC through this vulnerability.. EPSS estimates a 2.85% chance of exploitation in the next 30 days.

Description

An remote code execution vulnerability due to SSTI vulnerability and insufficient file name parameter validation was discovered in Genian NAC. Remote attackers are able to execute arbitrary malicious code with SYSTEM privileges on all connected nodes in NAC through this vulnerability.

Metrics

CVSS 3.1

10/10

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

EPSS Probability

2.85%

84.9th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Genians	Genian Nac	>= 4.0, <= 4.0.145.0831
Genians	Genian Nac	>= 5.0, <= 5.0.42.0827

References

https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66580Broken Link, Third Party Advisory
https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66580Broken Link, Third Party Advisory

Timeline

Published: Mar 25, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-26622?

How severe is CVE-2021-26622?

CVE-2021-26622 has a CVSS score of 10/10 (CRITICAL severity). The EPSS model estimates a 2.85% probability of exploitation in the next 30 days.

How do I fix CVE-2021-26622?

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-2021-26622?

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

Scan your code now

Source: NVD / NIST