{"schema_version":1,"title":"Open-Xchange vulnerabilities","summary":"Junglewise Threat Intelligence has tracked 30 vulnerabilities in Open-Xchange: 0 in the last 7 days and 19 in the last 90 days, 1 of them critical and 0 exploited in the wild. The most recent, CVE-2026-73209, was published on 28 August 2026. 2 technologies have a page of their own.","url":"https://junglewise.ai/threats/vendors/open-xchange","json_url":"https://junglewise.ai/threats/vendors/open-xchange.json","publisher":"Junglewise Threat Intelligence","license":"CC-BY-4.0","license_url":"https://creativecommons.org/licenses/by/4.0/","attribution":"Junglewise Threat Intelligence, https://junglewise.ai/threats/vendors/open-xchange","sources":"NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories","kind":"vendor","counts":{"high":10,"all_time":30,"critical":1,"exploited":0,"last_7_days":0,"last_30_days":19,"last_90_days":19,"last_365_days":29},"latest":[{"cve":"CVE-2026-73209","cvss":6.5,"epss":0.0041,"slug":"cve-2026-73209-open-xchange-dovecot-stack-exhaustion-denial-of-service","title":"Open-Xchange Dovecot stack exhaustion denial of service","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:31.247+00:00","url":"https://junglewise.ai/threats/cve-2026-73209-open-xchange-dovecot-stack-exhaustion-denial-of-service"},{"cve":"CVE-2026-73208","cvss":7.4,"epss":0.0032,"slug":"cve-2026-73208-open-xchange-dovecot-oauth2-token-scope-validation-bypass","title":"Open-Xchange Dovecot OAuth2 token scope validation bypass","severity":"high","exploited":false,"published_at":"2026-08-28T12:16:31.127+00:00","url":"https://junglewise.ai/threats/cve-2026-73208-open-xchange-dovecot-oauth2-token-scope-validation-bypass"},{"cve":"CVE-2026-52687","cvss":6.5,"epss":0.0041,"slug":"cve-2026-52687-open-xchange-dovecot-denial-of-service-via-imap-compression","title":"Open-Xchange Dovecot denial of service via IMAP compression","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:30.133+00:00","url":"https://junglewise.ai/threats/cve-2026-52687-open-xchange-dovecot-denial-of-service-via-imap-compression"},{"cve":"CVE-2026-52681","cvss":3.1,"epss":0.0031,"slug":"cve-2026-52681-open-xchange-dovecot-sieve-cpu-resource-accounting-bypass","title":"Open-Xchange Dovecot Sieve CPU resource accounting bypass","severity":"low","exploited":false,"published_at":"2026-08-28T12:16:30.01+00:00","url":"https://junglewise.ai/threats/cve-2026-52681-open-xchange-dovecot-sieve-cpu-resource-accounting-bypass"},{"cve":"CVE-2026-42395","cvss":4.3,"epss":0.0024,"slug":"cve-2026-42395-open-xchange-dovecot-denial-of-service-via-nul-byte-in-trusted","title":"Open-Xchange Dovecot denial of service via NUL byte in trusted proxy forwarding","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:29.887+00:00","url":"https://junglewise.ai/threats/cve-2026-42395-open-xchange-dovecot-denial-of-service-via-nul-byte-in-trusted"},{"cve":"CVE-2026-42392","cvss":4.3,"epss":0.003,"slug":"cve-2026-42392-open-xchange-dovecot-information-disclosure-in-imap-urlfetch","title":"Open-Xchange Dovecot information disclosure in IMAP URLFETCH","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:29.64+00:00","url":"https://junglewise.ai/threats/cve-2026-42392-open-xchange-dovecot-information-disclosure-in-imap-urlfetch"},{"cve":"CVE-2026-42391","cvss":7.5,"epss":0.0048,"slug":"cve-2026-42391-ox-dovecot-pro-denial-of-service-via-malformed-imap-id-command","title":"OX Dovecot Pro denial of service via malformed IMAP ID command","severity":"high","exploited":false,"published_at":"2026-08-28T12:16:29.503+00:00","url":"https://junglewise.ai/threats/cve-2026-42391-ox-dovecot-pro-denial-of-service-via-malformed-imap-id-command"},{"cve":"CVE-2026-42008","cvss":4.3,"epss":0.0026,"slug":"cve-2026-42008-open-xchange-dovecot-trusted-proxy-authentication-bypass","title":"Open-Xchange Dovecot trusted proxy authentication bypass","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:29.38+00:00","url":"https://junglewise.ai/threats/cve-2026-42008-open-xchange-dovecot-trusted-proxy-authentication-bypass"},{"cve":"CVE-2026-42007","cvss":9.1,"epss":0.0039,"slug":"cve-2026-42007-open-xchange-dovecot-use-after-free-in-sieve-editheader-extension","title":"Open-Xchange Dovecot use-after-free in Sieve editheader extension","severity":"critical","exploited":false,"published_at":"2026-08-28T12:16:29.26+00:00","url":"https://junglewise.ai/threats/cve-2026-42007-open-xchange-dovecot-use-after-free-in-sieve-editheader-extension"},{"cve":"CVE-2026-40205","cvss":5.9,"epss":0.0023,"slug":"cve-2026-40205-open-xchange-dovecot-oauth2-scope-validation-bypass","title":"Open-Xchange Dovecot OAuth2 scope validation bypass","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:29.14+00:00","url":"https://junglewise.ai/threats/cve-2026-40205-open-xchange-dovecot-oauth2-scope-validation-bypass"},{"cve":"CVE-2026-40204","cvss":3.1,"epss":0.0021,"slug":"cve-2026-40204-open-xchange-dovecot-authentication-bypass","title":"Open-Xchange Dovecot authentication bypass","severity":"low","exploited":false,"published_at":"2026-08-28T12:16:29.023+00:00","url":"https://junglewise.ai/threats/cve-2026-40204-open-xchange-dovecot-authentication-bypass"},{"cve":"CVE-2026-40203","cvss":3.7,"epss":0.0027,"slug":"cve-2026-40203-open-xchange-dovecot-imap-compression-information-disclosure","title":"Open-Xchange Dovecot IMAP compression information disclosure","severity":"low","exploited":false,"published_at":"2026-08-28T12:16:28.897+00:00","url":"https://junglewise.ai/threats/cve-2026-40203-open-xchange-dovecot-imap-compression-information-disclosure"},{"cve":"CVE-2026-40019","cvss":5.9,"epss":0.0038,"slug":"cve-2026-40019-open-xchange-dovecot-managesieve-infinite-loop-denial-of-service","title":"Open-Xchange Dovecot ManageSieve infinite loop denial of service","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:28.77+00:00","url":"https://junglewise.ai/threats/cve-2026-40019-open-xchange-dovecot-managesieve-infinite-loop-denial-of-service"},{"cve":"CVE-2026-40018","cvss":7.4,"epss":0.0034,"slug":"cve-2026-40018-open-xchange-dovecot-authentication-bypass","title":"Open-Xchange Dovecot authentication bypass","severity":"high","exploited":false,"published_at":"2026-08-28T12:16:28.63+00:00","url":"https://junglewise.ai/threats/cve-2026-40018-open-xchange-dovecot-authentication-bypass"},{"cve":"CVE-2026-40015","cvss":4.3,"epss":0.0036,"slug":"cve-2026-40015-open-xchange-dovecot-imap-hibernation-denial-of-service","title":"Open-Xchange Dovecot IMAP hibernation denial of service","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:28.363+00:00","url":"https://junglewise.ai/threats/cve-2026-40015-open-xchange-dovecot-imap-hibernation-denial-of-service"},{"cve":"CVE-2026-33607","cvss":4.3,"epss":0.0036,"slug":"cve-2026-33607-open-xchange-dovecot-cpu-exhaustion-in-imap-list","title":"Open-Xchange Dovecot CPU exhaustion in IMAP LIST","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:27.99+00:00","url":"https://junglewise.ai/threats/cve-2026-33607-open-xchange-dovecot-cpu-exhaustion-in-imap-list"},{"cve":"CVE-2026-33606","cvss":4.8,"epss":0.0025,"slug":"cve-2026-33606-open-xchange-dovecot-dsync-protocol-injection-via-mail-content","title":"Open-Xchange Dovecot dsync protocol injection via mail content","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:27.867+00:00","url":"https://junglewise.ai/threats/cve-2026-33606-open-xchange-dovecot-dsync-protocol-injection-via-mail-content"},{"cve":"CVE-2026-33605","cvss":7.5,"epss":0.0048,"slug":"cve-2026-33605-dovecot-managesieve-denial-of-service-via-malformed-pre-auth","title":"Dovecot ManageSieve denial of service via malformed pre-auth command","severity":"high","exploited":false,"published_at":"2026-08-28T12:16:27.74+00:00","url":"https://junglewise.ai/threats/cve-2026-33605-dovecot-managesieve-denial-of-service-via-malformed-pre-auth"},{"cve":"CVE-2026-33263","cvss":4.3,"epss":0.0036,"slug":"cve-2026-33263-ox-dovecot-submission-login-denial-of-service-via-file-descriptor","title":"OX Dovecot submission-login denial of service via file descriptor handling","severity":"medium","exploited":false,"published_at":"2026-08-28T12:16:27.483+00:00","url":"https://junglewise.ai/threats/cve-2026-33263-ox-dovecot-submission-login-denial-of-service-via-file-descriptor"},{"cve":"CVE-2026-42006","cvss":4.3,"epss":0.0001,"slug":"cve-2026-42006-open-xchange-dovecot-uncontrolled-memory-consumption-in-imap","title":"Open-Xchange Dovecot uncontrolled memory consumption in IMAP","severity":"medium","exploited":false,"published_at":"2026-05-12T14:17:04.703+00:00","url":"https://junglewise.ai/threats/cve-2026-42006-open-xchange-dovecot-uncontrolled-memory-consumption-in-imap"},{"cve":"CVE-2026-40020","cvss":3.1,"epss":0.0001,"slug":"cve-2026-40020-open-xchange-dovecot-improper-access-control-in-imap-setacl","title":"Open-Xchange Dovecot improper access control in IMAP SETACL","severity":"low","exploited":false,"published_at":"2026-05-12T14:17:03.687+00:00","url":"https://junglewise.ai/threats/cve-2026-40020-open-xchange-dovecot-improper-access-control-in-imap-setacl"},{"cve":"CVE-2026-40016","cvss":5.3,"epss":0.0001,"slug":"cve-2026-40016-open-xchange-dovecot-cpu-limit-bypass-in-sieve-scripts","title":"Open-Xchange Dovecot CPU limit bypass in Sieve scripts","severity":"medium","exploited":false,"published_at":"2026-05-12T14:17:03.57+00:00","url":"https://junglewise.ai/threats/cve-2026-40016-open-xchange-dovecot-cpu-limit-bypass-in-sieve-scripts"},{"cve":"CVE-2026-33603","cvss":6.8,"epss":0.0001,"slug":"cve-2026-33603-open-xchange-dovecot-scram-tls-channel-binding-spoofing","title":"Open-Xchange Dovecot SCRAM TLS channel binding spoofing","severity":"medium","exploited":false,"published_at":"2026-05-12T14:17:01.6+00:00","url":"https://junglewise.ai/threats/cve-2026-33603-open-xchange-dovecot-scram-tls-channel-binding-spoofing"},{"cve":"CVE-2026-27851","cvss":7.4,"epss":0.0001,"slug":"cve-2026-27851-open-xchange-dovecot-injection-via-unsafe-variable-expansion","title":"Open-Xchange Dovecot injection via unsafe variable expansion","severity":"high","exploited":false,"published_at":"2026-05-12T14:16:56.857+00:00","url":"https://junglewise.ai/threats/cve-2026-27851-open-xchange-dovecot-injection-via-unsafe-variable-expansion"},{"cve":"CVE-2026-27858","cvss":7.5,"epss":0.0046,"slug":"cve-2026-27858-open-xchange-dovecot-denial-of-service-in-managesieve","title":"Open-Xchange Dovecot denial of service in ManageSieve","severity":"high","exploited":false,"published_at":"2026-03-27T09:16:20.073+00:00","url":"https://junglewise.ai/threats/cve-2026-27858-open-xchange-dovecot-denial-of-service-in-managesieve"}],"vendor":{"hub":true,"name":"Open-Xchange","slug":"open-xchange","homepage":"https://www.open-xchange.com/","description":"Open-Xchange is a software provider that develops email, collaboration, and office productivity software for service providers.","url":"https://junglewise.ai/threats/vendors/open-xchange"},"weekly":[{"week":"2026-06-29","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-06","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-13","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-20","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-07-27","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-03","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-10","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-17","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-08-24","critical":1,"exploited":0,"vulnerabilities":19},{"week":"2026-08-31","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-07","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-14","critical":0,"exploited":0,"vulnerabilities":0},{"week":"2026-09-21","critical":0,"exploited":0,"vulnerabilities":0}],"most_severe":[{"cve":"CVE-2026-42007","cvss":9.1,"epss":0.0039,"slug":"cve-2026-42007-open-xchange-dovecot-use-after-free-in-sieve-editheader-extension","title":"Open-Xchange Dovecot use-after-free in Sieve editheader extension","severity":"critical","exploited":false,"published_at":"2026-08-28T12:16:29.26+00:00","url":"https://junglewise.ai/threats/cve-2026-42007-open-xchange-dovecot-use-after-free-in-sieve-editheader-extension"},{"cve":"CVE-2024-4367","cvss":8.8,"epss":0.7066,"slug":"cve-2024-4367-mozilla-pdf-js-arbitrary-javascript-execution-in-font-handling","title":"Mozilla PDF.js arbitrary JavaScript execution in font handling","severity":"high","exploited":false,"published_at":"2024-05-14T18:15:12.467+00:00","url":"https://junglewise.ai/threats/cve-2024-4367-mozilla-pdf-js-arbitrary-javascript-execution-in-font-handling"},{"cve":"CVE-2026-24031","cvss":7.7,"epss":0.0029,"slug":"cve-2026-24031-dovecot-sql-authentication-bypass-via-cleared-auth-username-chars","title":"Dovecot SQL authentication bypass via cleared auth_username_chars","severity":"high","exploited":false,"published_at":"2026-03-27T09:16:19.447+00:00","url":"https://junglewise.ai/threats/cve-2026-24031-dovecot-sql-authentication-bypass-via-cleared-auth-username-chars"},{"cve":"CVE-2026-42391","cvss":7.5,"epss":0.0048,"slug":"cve-2026-42391-ox-dovecot-pro-denial-of-service-via-malformed-imap-id-command","title":"OX Dovecot Pro denial of service via malformed IMAP ID command","severity":"high","exploited":false,"published_at":"2026-08-28T12:16:29.503+00:00","url":"https://junglewise.ai/threats/cve-2026-42391-ox-dovecot-pro-denial-of-service-via-malformed-imap-id-command"},{"cve":"CVE-2026-33605","cvss":7.5,"epss":0.0048,"slug":"cve-2026-33605-dovecot-managesieve-denial-of-service-via-malformed-pre-auth","title":"Dovecot ManageSieve denial of service via malformed pre-auth command","severity":"high","exploited":false,"published_at":"2026-08-28T12:16:27.74+00:00","url":"https://junglewise.ai/threats/cve-2026-33605-dovecot-managesieve-denial-of-service-via-malformed-pre-auth"},{"cve":"CVE-2026-27858","cvss":7.5,"epss":0.0046,"slug":"cve-2026-27858-open-xchange-dovecot-denial-of-service-in-managesieve","title":"Open-Xchange Dovecot denial of service in ManageSieve","severity":"high","exploited":false,"published_at":"2026-03-27T09:16:20.073+00:00","url":"https://junglewise.ai/threats/cve-2026-27858-open-xchange-dovecot-denial-of-service-in-managesieve"},{"cve":"CVE-2025-59032","cvss":7.5,"epss":0.0041,"slug":"cve-2025-59032-open-xchange-dovecot-denial-of-service-in-managesieve","title":"Open-Xchange Dovecot denial of service in ManageSieve AUTHENTICATE","severity":"high","exploited":false,"published_at":"2026-03-27T09:16:18.933+00:00","url":"https://junglewise.ai/threats/cve-2025-59032-open-xchange-dovecot-denial-of-service-in-managesieve"},{"cve":"CVE-2026-40018","cvss":7.4,"epss":0.0034,"slug":"cve-2026-40018-open-xchange-dovecot-authentication-bypass","title":"Open-Xchange Dovecot authentication bypass","severity":"high","exploited":false,"published_at":"2026-08-28T12:16:28.63+00:00","url":"https://junglewise.ai/threats/cve-2026-40018-open-xchange-dovecot-authentication-bypass"},{"cve":"CVE-2026-73208","cvss":7.4,"epss":0.0032,"slug":"cve-2026-73208-open-xchange-dovecot-oauth2-token-scope-validation-bypass","title":"Open-Xchange Dovecot OAuth2 token scope validation bypass","severity":"high","exploited":false,"published_at":"2026-08-28T12:16:31.127+00:00","url":"https://junglewise.ai/threats/cve-2026-73208-open-xchange-dovecot-oauth2-token-scope-validation-bypass"},{"cve":"CVE-2026-27856","cvss":7.4,"epss":0.0029,"slug":"cve-2026-27856-dovecot-doveadm-timing-oracle-vulnerability-in-credential","title":"Dovecot Doveadm timing oracle vulnerability in credential verification","severity":"high","exploited":false,"published_at":"2026-03-27T09:16:19.767+00:00","url":"https://junglewise.ai/threats/cve-2026-27856-dovecot-doveadm-timing-oracle-vulnerability-in-credential"}],"generated_at":"2026-09-26T09:11:00.170868+00:00","technologies":[{"name":"Open-Xchange Dovecot Pro","slug":"dovecot-pro","vulnerabilities":28,"url":"https://junglewise.ai/threats/technologies/dovecot-pro"},{"name":"Open-Xchange Dovecot CE","slug":"dovecot-ce","vulnerabilities":8,"url":"https://junglewise.ai/threats/technologies/dovecot-ce"}]}