{"id":"CVE-2026-50056","aliases":[],"cve":{"records":[{"id":"CVE-2026-50056","source":"rapid7","state":"PUBLISHED","reasons":[],"replacements":[],"disputed":false,"unsupportedWhenAssigned":false,"reserved":"2026-06-03T09:35:31.591Z","published":"2026-10-23T13:30:43.654Z","modified":"2026-10-29T10:45:48.481Z"}],"publishers":[{"name":"rapid7","role":"CNA","organizationId":"9974b330-7714-4307-a722-5648477acda7","modified":"2026-10-23T13:30:43.654Z"},{"name":"CISA-ADP","role":"ADP","organizationId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","modified":"2026-10-29T10:45:48.481Z"}],"references":[{"url":"https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories","tags":["vendor-advisory"],"source":"rapid7"},{"url":"https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1/","tags":["related"],"source":"rapid7"}],"weaknesses":[{"id":"CWE-88","description":"CWE-88 Improper neutralization of argument delimiters in a command ('argument injection')","source":"rapid7"}],"applicability":[],"prioritization":[{"source":"CISA-ADP","type":"SSVC","role":"CISA Coordinator","timestamp":"2026-10-24T03:55:31.172902Z","decisions":[{"name":"Exploitation","value":"none"},{"name":"Automatable","value":"no"},{"name":"Technical Impact","value":"total"}]}]},"title":"Zimbra Collaboration Suite Local Privilege Escalation via zmmailboxdmgr JVM Argument Injection","titleSource":"rapid7","descriptionSource":"rapid7","description":"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affected.","score":7.8,"severity":"high","published":"2026-10-23T13:30:43.654Z","modified":"2026-10-29T10:45:48.481Z","withdrawn":false,"knownExploited":false,"affected":[],"products":[{"vendor":"Zimbra","name":"Zimbra Collaboration Suite","platforms":[],"versions":[{"version":"0","status":"affected","lessThanOrEqual":"10.1.21","versionType":"semver"}],"defaultStatus":"unaffected","cpes":[],"source":"rapid7","url":"https://www.cve.org/CVERecord?id=CVE-2026-50056"}],"remediation":[],"references":["https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories","https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1/"],"sources":[{"name":"CVE","id":"CVE-2026-50056","modified":"2026-10-29T10:45:48.481Z","url":"https://www.cve.org/CVERecord?id=CVE-2026-50056"}],"assessments":[{"source":"rapid7","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8}],"sourceAffected":[],"observedAt":"2026-10-29T14:38:37.216Z","kev":{"status":"not-listed","checkedAt":"2026-10-31T14:15:35.655Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[],"aiSummary":{"text":"Zimbra Collaboration Suite versions 10.1.16 and 10.1.21 have a local privilege escalation vulnerability via JVM argument injection in zmmailboxdmgr, allowing the Unix zimbra account to execute arbitrary commands as root with local command execution access. The weakness is due to improper neutralization of argument delimiters. An attacker must interrupt mailboxd during a malicious restart.","model":"@cf/meta/llama-3.3-70b-instruct-fp8-fast","generatedAt":"2026-10-30T09:20:59.432Z","sources":[{"name":"CVE","url":"https://www.cve.org/CVERecord?id=CVE-2026-50056"}]}}