Is CVE-2021-44159 actively exploited?

No active exploitation of CVE-2021-44159 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-44159 be exploited remotely?

Yes. CVE-2021-44159 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-44159?

CVE-2021-44159 has a CVSS score of 9.8 (CRITICAL).

HOME VULNERABILITIESCVE-2021-44159

CRITICAL

CVE-2021-44159

CWE-434Published: December 20, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-44159 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.