MEDIUMCVSS v3.1 4.3Vulnerability
CVE-2026-93634
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.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-10-23T14:24:59.572098+00:00
- Cvss severity
- MEDIUM
- Cvss score
- 4.3
- Retrieved at
- 2026-10-23T14:28:02+00:00
- Score
- 4.3
- Cvss version
- 3.1
- Last source
- NVD
- Cve id
- CVE-2026-93634
- Cvss vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- First seen by Signal
- 2026-10-23T14:28:02+00:00
- Name
- CVE-2026-93634
- Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N
- Published at
- 2026-10-23T14:17:57.263
- Last modified
- 2026-10-23T14:17:57.263
Related Entities (1)
HAS_WEAKNESS (1)
Explore deeper with Ninja Signal's threat intelligence graph