{"id":"CVE-2026-93640","revision":null,"records":[{"revision":"0b03a85b94224b08bdff89bf563b89b0","observedAt":"2026-10-24T04:48:20.602+00:00","statement":{"source":"cve-program","id":"CVE-2026-93640","aliases":[],"title":"Zimbra Collaboration Suite Local Privilege Escalation via Unrestricted zmunbound Sudo Configuration","description":"A local privilege escalation vulnerability in the optional dnscache package of Zimbra Collaboration Suite (ZCS) allows the Unix zimbra account to access files with root privileges. The passwordless sudo policy permits arbitrary arguments to zmunbound, whose wrapper forwards them to Unbound without restricting the configuration path. An attacker can supply a configuration that retains root privileges and disables the chroot. Include directives expose root-readable file contents through parser errors, while an attacker-selected logfile path creates a root-owned file or appends Unbound log records to an existing file. This can disclose password hashes and private keys and corrupt privileged configuration files, preventing affected services from starting with the modified configuration. The affected configuration is present in ZCS 10.1.16 and 10.1.21 dnscache packages.","state":0,"publishedAt":"2026-10-23T13:34:41.851+00:00","modifiedAt":"2026-10-24T03:55:19.407+00:00","affected":[{"ecosystem":"Vendor product","name":"Zimbra Collaboration Suite","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"Zimbra\",\n                    \"product\": \"Zimbra Collaboration Suite\",\n                    \"versions\": [\n                        {\n                            \"status\": \"affected\",\n                            \"version\": \"0\",\n                            \"lessThanOrEqual\": \"10.1.21\",\n                            \"versionType\": \"semver\"\n                        }\n                    ],\n                    \"defaultStatus\": \"unaffected\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","score":7.8,"severity":"HIGH"}],"references":["https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories","https://www.rapid7.com/blog/post/ve-breaking-zimbra-identity-boundaries-part-1/"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-93640","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-93640","identifiers":["CVE-2026-93640"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-24T13:07:12.8861655+00:00","complete":true,"records":1756,"lastAttemptAt":"2026-10-24T13:07:12.8861655+00:00","lastSuccessAt":"2026-10-24T13:07:13.0994584+00:00","error":null,"lastVerifiedAt":"2026-10-24T13:07:13.0994595+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-9b3cad78792c7367da03684feab05819ddebc4d137048bdbbdabdbb4d2879391-24d772d6d275e66ff9b846f5e1dd397cdb05cd344ee3edac1671551b05b4b42b","complete":true,"records":413898,"lastAttemptAt":"2026-10-24T13:17:09.7466599+00:00","lastSuccessAt":"2026-10-24T13:07:12.6126357+00:00","error":null,"lastVerifiedAt":"2026-10-24T13:17:09.7466599+00:00","snapshotPublishedAt":"2026-10-24T12:29:02+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-24T13:07:12.8861655+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-24T13:07:12.8861655+00:00","lastSuccessAt":"2026-10-24T13:07:13.2725477+00:00","error":null,"lastVerifiedAt":"2026-10-24T13:07:13.2725483+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-16ad89dfea13ab9e9b0108e63a759d63bd4559cc68b58491107d62ee35bbbaf2","complete":true,"records":1965,"lastAttemptAt":"2026-10-24T13:17:10.0113348+00:00","lastSuccessAt":"2026-10-23T16:01:26.4487605+00:00","error":null,"lastVerifiedAt":"2026-10-24T13:17:10.0113348+00:00","snapshotPublishedAt":"2026-10-21T12:18:07+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":null,"complete":false,"records":0,"lastAttemptAt":"2026-10-24T13:17:17.7933019+00:00","lastSuccessAt":null,"error":null,"lastVerifiedAt":null,"snapshotPublishedAt":null,"importing":true,"stagedRecords":230735,"checkedIdentifiers":null,"expectedIdentifiers":null}]}