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CVE-2026-44400— MailEnable Enterprise Premium < 10.55 Authorization Bypass via WebAdmin

Quick assessment

Affected
MailEnable MailEnable Enterprise Premium
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

MailEnable Enterprise Premium是澳大利亚MailEnable公司的一套POP3和SMTP邮件服务器。 MailEnable Enterprise Premium 10.55及之前版本存在安全漏洞，该漏洞源于WebAdmin移动门户中的授权不当，可能导致攻击者重用低权限用户的AuthenticationToken cookie绕过身份验证。

CVSS 8.1 · High EPSS 0.61% · P47

Affected Version Matrix 1

VendorProduct Version RangeStatus
MailEnable MailEnable Enterprise Premium ≤ 10.55 affected
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I. Basic Information for CVE-2026-44400

Vulnerability Information
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Vulnerability Title
MailEnable Enterprise Premium < 10.55 Authorization Bypass via WebAdmin
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
通过用户控制密钥绕过授权机制
Source: CVE Program / CVE List V5
Vulnerability Title
MailEnable Enterprise Premium 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
MailEnable Enterprise Premium是澳大利亚MailEnable公司的一套POP3和SMTP邮件服务器。 MailEnable Enterprise Premium 10.55及之前版本存在安全漏洞，该漏洞源于WebAdmin移动门户中的授权不当，可能导致攻击者重用低权限用户的AuthenticationToken cookie绕过身份验证。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
MailEnable MailEnable Enterprise Premium 0 ~ 10.55 -

II. Public POCs for CVE-2026-44400

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

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III. Intelligence Information for CVE-2026-44400

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Vendor Advisories for CVE-2026-44400 (1)

Vendor Pages for CVE-2026-44400 (1)

IV. Related Vulnerabilities

Same vendor: MailEnable
Same weakness: CWE-639

V. Comments for CVE-2026-44400

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