CVE-2026-44400

High

Description

MailEnable Enterprise Premium 10.55 and earlier contains an improper authorization vulnerability in the WebAdmin mobile portal that allows attackers to bypass authentication checks by reusing AuthenticationToken cookies generated for low-privileged users. Attackers can obtain a token from the WebMail login endpoint using the PersistentLogin parameter and replay it against the WebAdmin portal to perform highly privileged administrative actions.

SeverityHigh

CVSS8.1

Exploit probability—

ProductMailenable

PublishedMay 8, 2026

First seenMay 8, 2026

Weakness typeCWE-639Authorization bypass through user-controlled key

How to fix

Update

mailenable mailenable10.56 or later

Vendor advisories

mailenable.com/Premium-ReleaseNotes.txt

Affected products

Product	Affected versions	Fixed in
mailenable mailenable	v < 10.56	10.56

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