Is CVE-2026-40592 actively exploited?

No active exploitation of CVE-2026-40592 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2026-40592 be exploited remotely?

Yes. CVE-2026-40592 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2026-40592?

CVE-2026-40592 has a CVSS score of 5.9 (MEDIUM).

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MEDIUM

CVE-2026-40592

CWE-862Published: April 21, 2026· Updated: Apr 22, 2026

5.9

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, the undo-send route `GET /conversation/undo-reply/{thread_id}` checks only whether the current user can view the parent conversation. It does not verify that the current user created the reply being undone. In a shared mailbox, one agent can therefore recall another agent's just-sent reply during the 15-second undo window. Version 1.8.214 fixes the vulnerability.

NVD Source

Technical Analysis

CVE-2026-40592 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 5.9.