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Vulnerability record · CVE-2026-44400 · published 8 May 2026

CVE-2026-44400: Mailenable insecure direct object reference vulnerability

Mailenable · Mailenable

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.

8.7 CVSS 4.0 High EPSS 0.61% · top 53.0% CWE-639 · Insecure direct object reference
8.7CVSS 4.0 base score
0.61%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
17 Jun 2026Last modified by NVD

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.

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://www.mailenable.com/Premium-ReleaseNotes.txt Release Notes
https://www.vulncheck.com/advisories/mailenable-enterprise-premium-authorization-bypass-via-webadmin Third Party Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

10.0CVE-2015-9280Mailenable xml external entity (xxe) vulnerabilityMailEnable before 8.60 allows XXE via an XML document in the request.aspx Options parameter.EPSS 1.8%9.8CVE-2025-44148MailEnable failure.aspx XSS allows remote code executionMailEnable before v10 contains a cross-site scripting flaw in the failure.aspx component. The record describes it as allowing a remote attacker to ex…EPSS 55%analysed9.8CVE-2019-12924Mailenable missing encryption vulnerabilityMailEnable Enterprise Premium 10.23 was vulnerable to XML External Entity Injection (XXE) attacks that could be exploited by an unauthenticated user.…EPSS 0.90%9.8CVE-2015-9278Mailenable vulnerabilityMailEnable before 8.60 allows Privilege Escalation because admin accounts could be created as a consequence of %0A mishandling in AUTH.TAB after a pa…EPSS 2.5%9.1CVE-2015-9277Mailenable path traversal vulnerabilityMailEnable before 8.60 allows Directory Traversal for reading the messages of other users, uploading files, and deleting files because "/../" and "/.…EPSS 2.2%8.8CVE-2022-42136Mailenable path traversal vulnerabilityAuthenticated mail users, under specific circumstances, could add files with unsanitized content in public folders where the IIS user had permission …EPSS 0.87%8.8CVE-2019-12926Mailenable missing authorization vulnerabilityMailEnable Enterprise Premium 10.23 did not use appropriate access control checks in a number of areas. As a result, it was possible to perform a num…EPSS 0.94%8.5CVE-2025-34423Mailenable uncontrolled search path element vulnerabilityMailEnable versions prior to 10.54 contain an unsafe DLL loading vulnerability that can lead to local arbitrary code execution. The MailEnable admini…EPSS 0.17%

Source: NIST National Vulnerability Database (record CVE-2026-44400), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.