CVE-2026-44400HIGH 8.1EPSS p26.7%

CVE-2026-44400CVE-2026-44400

mailenable / mailenable

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.

Scoring

CVSS 3.18.1 (HIGH)
VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS0.35% probability of exploitation · percentile 26.7% · 2026-06-18T12:00:27Z
Published2026-05-08
Last modified2026-06-01

Underlying weaknesses· 1

CWE-639

References

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

1

TypeTargetConfidenceTier
WeaknessAuthorization Bypass Through User-Controlled Keycwe-6390%live

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Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.