CVE-2026-44400 MailEnable Enterprise Premium < 10.55 Authorization Bypass via WebAdmin
Attackers can bypass authentication in MailEnable WebAdmin by replaying low-privilege tokens to perform administrative actions.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-44400?
CVE-2026-44400 is a high-severity authentication bypass vulnerability in Mailenable Mailenable, published on 8 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.
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.
Weakness: CWE-639
Which versions are affected by CVE-2026-44400?
It affects 1 product.
Products include Mailenable Mailenable.
How do I fix CVE-2026-44400?
No fix has been published for CVE-2026-44400 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-44400 being exploited?
There is no known exploitation of CVE-2026-44400 in the wild and no public exploit code.
Other vulnerabilities in Mailenable Mailenable
- CVE-2015-9280 XML external entity in n/a
- CVE-2025-44148 Cross-site scripting in n/a
- CVE-2019-12924 XML external entity in n/a
- CVE-2015-9278 MailEnable before 8.60 allows Privilege Escalation because admin accounts could be created as a consequence of %0A mishandling in AUTH.TAB a
- CVE-2015-9277 Path traversal in n/a
Sources
Also known as GHSA-f3v7-jqh4-whf5.