CVE-2021-44159

CRITICAL 9.8CVE-2021-44159 · Published 20/12/2021 · updated 17/06/2026

In short

CVE-2021-44159 is a CRITICAL (CVSS 9.8) vulnerability affecting gcb doctor (4mosan).
Chance of exploitation in the next 30 days (EPSS): 3.5%, higher than 89.3% of all vulnerabilities.
Fix: update to 2021-09-16 or later.

Package	Affected versions	Patched versions
gcb doctor 4mosan	`< 2021-09-16`	`2021-09-16`

Description

4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.

References

twcert.org.tw/tw/cp-132-5395-eee40-1.html · Third Party Advisory

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