MailEnable Enterprise Premium < 10.55 Authorization Bypass via WebAdmin
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-639.
Summary
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Total
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| MailEnable | MailEnable Enterprise Premium | up to 10.55 | — | No fix listed | CNA |
- MailEnable Enterprise Premium VendorMailEnable Affected up to 10.55 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:mailenable:mailenable:*:*:*:*:enterprise_premium:*:*:* | before 10.56 | Vulnerable | MailEnable |
- cpe:2.3:a:mailenable:mailenable:*:*:*:*:enterprise_premium:*:*:* Versions before 10.56 Vulnerable ·MailEnable
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-44400
- 2026-10-03 Alias added: GHSA-f3v7-jqh4-whf5
References
More Mailenable vulnerabilities
- TI-2025-28598 Cross Site Scripting (XSS) vulnerability in MailEnable before v10 allows a remote… CVSS 3.1CRITICAL 9.8
- TI-2026-25313 MailEnable < 10.55 Reflected XSS via ManageShares.aspx SelectedIndex Parameter CVSS 4.0MEDIUM 5.1
- TI-2026-25315 MailEnable < 10.55 Reflected XSS via FreeBusy.aspx StartDate Parameter CVSS 4.0MEDIUM 5.1
- TI-2026-25314 MailEnable < 10.55 Reflected XSS via FreeBusy.aspx StartDate Parameter CVSS 4.0MEDIUM 5.1
- TI-2015-07656 MailEnable before 8.60 allows Privilege Escalation because admin accounts could be… CVSS 3.0CRITICAL 9.8
- TI-2015-07658 MailEnable before 8.60 allows XXE via an XML document in the request.aspx Options parameter. CVSS 3.1CRITICAL 10.0
Sources
- CVE-2026-44400 · CVE Program
- CVE-2026-44400 · NVD
- FIRST EPSS
- GHSA-f3v7-jqh4-whf5 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences