{"id":"CVE-2026-73576","state":"PUBLISHED","title":"In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated ","description":"In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure random number generator, resulting in insufficient entropy. An attacker who obtains a JWT signed with the generated secret may be able to recover the JWT signing secret through offline brute-force, potentially enabling JWT forgery.","publishedAt":"2026-08-13T15:26:20.436Z","updatedAt":"2026-08-13T15:58:52.960Z","severity":{"score":6.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N","source":"mitre"},"assigner":"mitre","products":["Zimbra Collaboration"],"affected":[{"vendor":"Zimbra","product":"Collaboration","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"10.1.17","versionType":"custom"}]}],"references":["https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories","https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy"],"weaknesses":["CWE-1241"],"ingestedAt":"2026-10-29T20:12:58.252Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/73xxx/CVE-2026-73576.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-73576","state":"PUBLISHED","datePublished":"2026-08-13T15:26:20.436Z","dateUpdated":"2026-08-13T15:58:52.960Z","assignerShortName":"mitre","assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateReserved":"2026-08-12T22:03:36.180Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In Zimbra Collaboration (ZCS) before 10.1.17, weak cryptographic key generation vulnerability exists in the OnlyOffice integration. The zimbraDocumentEditingJwtSecret is generated using an insecure random number generator, resulting in insufficient entropy. An attacker who obtains a JWT signed with the generated secret may be able to recover the JWT signing secret through offline brute-force, potentially enabling JWT forgery."}],"affected":[{"vendor":"Zimbra","product":"Collaboration","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"10.1.17","versionType":"custom"}]}],"references":[{"url":"https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"},{"url":"https://wiki.zimbra.com/wiki/Zimbra_Responsible_Disclosure_Policy"}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":6.3,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1241","description":"CWE-1241 Use of Predictable Algorithm in Random Number Generator","lang":"en","type":"CWE"}]}],"providerMetadata":{"shortName":"mitre","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","dateUpdated":"2026-08-13T15:26:20.436Z"},"x_generator":{"engine":"CVE-Request-form 0.0.1"},"cpeApplicability":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:*","versionEndExcluding":"10.1.17"}]}]}]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-13T15:49:28.578529Z","id":"CVE-2026-73576","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-13T15:58:52.960Z"}}]}}}