Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-50054— Zimbra Collaboration Suite GrantRightsRequest SOAP Handler Allows Self-Granting of Undocumented loginAs Mailbox Delegation Right

Quick assessment

Affected
Zimbra Zimbra Collaboration Suite
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.

Zimbra Collaboration Suite 中 GrantRightsRequest 存在一个授权缺陷，允许已认证账户的攻击者将 loginAs 权限授予其他本地账户，从而创建持久的邮箱访问权限和邮件发送权限，即使在密码更改或会话过期后这些权限仍然有效。

CVSS 7.1 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
Zimbra Zimbra Collaboration Suite < 10.1.20 affected
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-50054

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Zimbra Collaboration Suite GrantRightsRequest SOAP Handler Allows Self-Granting of Undocumented loginAs Mailbox Delegation Right
Source: CVE Program / CVE List V5
Vulnerability Description
An authorization flaw in Zimbra Collaboration Suite’s GrantRightsRequest allows an attacker with access to an authenticated account to grant another local account the loginAs right, creating persistent mailbox access and mail-sending authority that survives password changes and session expiry.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
特权管理不恰当
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Zimbra Zimbra Collaboration Suite 0 ~ 10.1.20 -

II. Public POCs for CVE-2026-50054

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

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-50054

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-50054 (1)

Same Patch Batch · Zimbra · 2026-10-08 · 3 CVEs total

CVE-2026-10631 6.5 MEDIUM Zimbra Collaboration Suite EWS Extension Authorization Bypass via Crafted Composite Folder
CVE-2026-50055 6.5 MEDIUM Zimbra Collaboration Suite Sieve Notify Filter Action Bypasses Mail Forwarding Restriction

IV. Related Vulnerabilities

Same product: Zimbra Collaboration Suite
Same vendor: Zimbra
Same weakness: CWE-269

V. Comments for CVE-2026-50054

No comments yet

Leave a comment