Genian NAC remote code execution vulnerability

published 2022-03-25 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-13416

cvss: 9.6; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 3.0%; EPSS 3.0% chance of exploitation in 30 days, percentile 87%
public exploits: 0; none known

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.

Exploit prediction

3.03% chance of exploitation in the next 30 days, higher than 87% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CNA	3.1	9.6	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD	3.1	10.0	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
NVD	2.0	10.0	AV:N/AC:L/Au:N/C:C/I:C/A:C

Affected products

Genians Co., Ltd Genian NAC Suite V4.0
Genians Co., Ltd Genian NAC V5.0 & Genian NAC Suite V5.0

Classification

Weakness

CWE-20 Improper Input Validation
CWE-94 Improper Control of Generation of Code

References

krcert.or.kr /krcert/secNoticeView.do?bulletin_writing_sequence=66580
broken-link, third-party-advisory

Sources

CVE List CVE-2021-26622
NVD CVE-2021-26622

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary