CVE-2026-40592Public exploitNetwork attack vector

Cross-user reply recall via missing ownership check

Published Apr 21, 2026 · Updated Apr 21, 2026

Missing authorization in FreeScout before 1.8.214 allows remote authenticated users to recall another agent's outbound reply. The undoReply controller authorizes access to the parent conversation but fails to compare the thread's created_by_user_id with the current user. A mailbox peer must know the reply thread identifier and act within the 15-second undo window, converting the sent reply back to a draft.

CVSS severity5.9
Medium
EPSS probability0.24%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in FreeScout before 1.8.214 allows remote authenticated users to recall another agent's outbound reply. The undoReply controller authorizes access to the parent conversation but fails to compare the thread's created_by_user_id with the current user. A mailbox peer must know the reply thread identifier and act within the 15-second undo window, converting the sent reply back to a draft.

The record

CVE
CVE-2026-40592
Published
Apr 21, 2026
Updated
Apr 21, 2026
Vendor
FreeScout
Product
FreeScout
Classifications
CWE-862, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.8.214

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FreeScout · FreeScoutversion=< 1.8.214

Published CVSS scores

5.9GitHub, Inc.CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-862Missing Authorization
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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