Is CVE-2021-43940 actively exploited?

No active exploitation of CVE-2021-43940 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-43940 be exploited remotely?

No. CVE-2021-43940 requires local access to exploit.

What is the CVSS score of CVE-2021-43940?

CVE-2021-43940 has a CVSS score of 7.8 (HIGH).

HOME VULNERABILITIESCVE-2021-43940

HIGH

CVE-2021-43940

CWE-427Published: February 15, 2022· Updated: Jun 17, 2026

7.8

CVSS v3.1

Official Description

Affected versions of Atlassian Confluence Server and Data Center allow authenticated local attackers to achieve elevated privileges on the local system via a DLL Hijacking vulnerability in the Confluence installer. This vulnerability only affects installations of Confluence Server and Data Center on Windows. The affected versions are before version 7.4.10, and from version 7.5.0 before 7.12.3.

NVD Source

Technical Analysis

CVE-2021-43940 requires local access, meaning attackers must already have a foothold on the target system.

Exploitation does not require any privileges, though user interaction (Required) is needed, which slightly reduces the risk of mass automated attacks.

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 7.8.