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High · 8.1 CVE-2026-44400 EUVD-2026-28827GHSA-f3v7-jqh4-whf5

MailEnable Enterprise Premium < 10.55 Authorization Bypass via WebAdmin

Published May 8, 2026 · Updated Jul 14, 2026 · Assigned by VulnCheck

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.

Affected products

VendorProductAffectedFixed
MailEnable MailEnable Enterprise Premium ≤ 10.55 —

References