Vulnerability · Published May 8, 2026 · Assigned by VulnCheck

CVE-2026-44400MailEnable Enterprise Premium < 10.55 Authorization Bypass via WebAdmin

High 8.1

In plain English

A high-severity authorization bypass via user-controlled key in MailEnable Enterprise Premium from MailEnable. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities).

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.4%top 71.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
MailEnable	MailEnable Enterprise Premium	0 – through 10.55

Weakness: CWE-639 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

References

https://www.mailenable.com/Premium-ReleaseNotes.txt release-notes
https://www.vulncheck.com/advisories/mailenable-enterprise-premium-authorization-bypass-via-webadmin third-party-advisory