Is CVE-2026-40589 actively exploited?

No active exploitation of CVE-2026-40589 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40589 be exploited remotely?

Yes. CVE-2026-40589 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40589?

CVE-2026-40589 has a CVSS score of 7.6 (HIGH).

HOME VULNERABILITIESCVE-2026-40589

HIGH

CVE-2026-40589

CWE-639Published: April 21, 2026· Updated: Apr 22, 2026

7.6

CVSS v3.1

EPSS:0.03%probability of exploitation in 30 daysPercentile:9.8th

Official Description

FreeScout is a free self-hosted help desk and shared mailbox. Prior to version 1.8.214, a low-privileged agent can edit a visible customer and add an email address already owned by a hidden customer in another mailbox. The server discloses the hidden customer’s name and profile URL in the success flash, reassigns the hidden email to the visible customer, and rebinds hidden-mailbox conversations for that email to the visible customer. Version 1.8.214 fixes the issue.

NVD Source

Technical Analysis

CVE-2026-40589 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in full integrity compromise (data manipulation), with a CVSS base score of 7.6.