Is CVE-2021-40643 actively exploited?

No active exploitation of CVE-2021-40643 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-40643 be exploited remotely?

Yes. CVE-2021-40643 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-40643?

CVE-2021-40643 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-40643

NVD-CWE-noinfoPublished: June 30, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

EyesOfNetwork before 07-07-2021 has a Remote Code Execution vulnerability on the mail options configuration page. In the location of the "sendmail" application in the "cacti" configuration page (by default/usr/sbin/sendmail) it is possible to execute any command, which will be executed when we make a test of the configuration ("send test mail").

NVD Source

Technical Analysis

CVE-2021-40643 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.