CVE-2026-44400

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.

CVSS 4.0

8.7CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

CVSS 3.1

9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS

0.4% chance of exploitation in the next 30 days; higher than 28% of CVEs (scores of 2026-10-26)

CWE

CWE-639

Published

2026-05-08

Modified

2026-10-26

Record from

the NVD, synced 2026-10-26

Affected

• mailenable:mailenable

References

• https://www.mailenable.com/Premium-ReleaseNotes.txt
• https://www.vulncheck.com/advisories/mailenable-enterprise-premium-authorization-bypass-via-webadmin

Check your stackJSON