CVE Watch23 oct 2026

CVE-2026-93634

A cross-account authorization vulnerability in Zimbra Collaboration Suite (ZCS) allows an authenticated user to insert forged shared-file re

CVSS

4.3

Medio

EPSS

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KEV

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Exploit Today

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0-100

Publicado: 23 oct 2026 · Última mod.: 23 oct 2026 · CWE-639

EPSS · 30d

Sin historial EPSS suficiente todavía.

Descripción técnica

A cross-account authorization vulnerability in Zimbra Collaboration Suite (ZCS) allows an authenticated user to insert forged shared-file records into another user's mailbox through FileSharedWithMeRequest. The request bypasses delegated-account authorization and accepts attacker-selected file metadata, owner identifiers and declared sizes without validating a corresponding document share. An attacker can plant entries attributed to another real local account without that account sharing a document. No victim interaction is required. ZCS 10.1.16 and 10.1.20 are affected.

Referencias oficiales

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