HOMEVULNERABILITIESCVE-2026-44400
HIGH

CVE-2026-44400

CWE-639Published: May 8, 2026· Updated: May 13, 2026

8.1
CVSS v3.1
EPSS:0.03%probability of exploitation in 30 daysPercentile:8.2th

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.

NVD Source

Technical Analysis

CVE-2026-44400 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 8.1.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityHigh
Privileges Req.None
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

All References (2)

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

Quick Facts

CVE IDCVE-2026-44400
CVSS Score8.1 / 10
SeverityHIGH
WeaknessCWE-639
CISA KEVNo
EPSS (30d)0.03%
PublishedMay 8, 2026

Related CVEs (CWE-639)

CVE-2026-45552
9.9
CVE-2026-29200
9.9
CVE-2018-25270
9.8
CVE-2026-2347
9.8
CVE-2017-20223
9.8
CVE-2026-33511
9.8

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2026-44400 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
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