CVE-2026-44400CWE-639

MailEnable Enterprise Premium < 10.55 Authorization Bypass via WebAdmin

High · published May 8, 2026

CVSS v4.0
8.7
EPSS
1%
Percentile
48.5
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.7 · HIGH
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00609 · 48.5th percentile
Weakness
CWE-639 · Authorization Bypass Through User-Controlled Key
Published
2026-05-08T20:22Z
EPSS history
Timeline
  • 08 MAY 20:22Z
    MailEnable Enterprise Premium < 10.55 Authorization Bypass via WebAdmin
    cvelistv5