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CVE-2026-50056

7.8 high SSVC exploitation: none Published
NVD · CVE.org

A local privilege escalation vulnerability in the zmmailboxdmgr launcher of Zimbra Collaboration Suite (ZCS) allows the Unix zimbra account to execute arbitrary commands as root. The passwordless sudo interface accepts JVM arguments that are not adequately restricted. An attacker can postpone Jetty's privilege drop, register an OnOutOfMemoryError command and force heap exhaustion during startup, causing the command to execute while the JVM still runs as root. Exploitation requires local command execution as zimbra on a mailbox server and interrupts mailboxd during the malicious restart. ZCS 10.1.16 and 10.1.21 are affected.

Fix

Nothing published yet: no patch, vendor advisory or mitigation reference on NVD, no vendor advisory in the News for this CVE, not in CISA's KEV, no fixed package version. BaselineWatch does not guess at one.

Change history 7

  1. StatusUndergoing Analysis → PublishedNVD modified 2026-10-24 03:55
  2. StatusPublished → Undergoing AnalysisNVD modified 2026-10-24 04:18
  3. StatusAwaiting Analysis → PublishedNVD modified 2026-10-23 13:30
  4. StatusPublished → Awaiting AnalysisNVD modified 2026-10-23 16:44
  5. StatusReceived → PublishedNVD modified 2026-10-23 13:30
  6. StatusPublished → ReceivedNVD modified 2026-10-23 14:17
  7. First seenCVSS 7.8 · zimbraNVD modified 2026-10-23 13:30

Affected (CPE criteria) 0

NVD has not attached CPE configurations yet.

References 2