{"api_version":"1","generated_at":"2026-10-22T02:31:50+00:00","cve":"CVE-2025-67896","urls":{"html":"https://cve.report/CVE-2025-67896","api":"https://cve.report/api/cve/CVE-2025-67896.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2025-67896","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2025-67896"},"summary":{"title":"CVE-2025-67896","description":"Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.","state":"PUBLISHED","assigner":"mitre","published_at":"2025-12-14 04:15:50","updated_at":"2026-10-14 13:10:00"},"problem_types":["CWE-122","CWE-122 CWE-122 Heap-based Buffer Overflow"],"metrics":[{"version":"3.1","source":"nvd@nist.gov","type":"Primary","score":"9.8","severity":"CRITICAL","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}},{"version":"3.1","source":"cve@mitre.org","type":"Secondary","score":"7","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","baseScore":7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"LOW"}},{"version":"3.1","source":"CNA","type":"CVSS","score":"7","severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","data":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","version":"3.1"}}],"references":[{"url":"http://www.openwall.com/lists/oss-security/2025/12/14/1","name":"http://www.openwall.com/lists/oss-security/2025/12/14/1","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://exim.org/static/doc/security/","name":"https://exim.org/static/doc/security/","refsource":"cve@mitre.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"http://www.openwall.com/lists/oss-security/2025/12/18/3","name":"http://www.openwall.com/lists/oss-security/2025/12/18/3","refsource":"af854a3a-2127-422b-91ae-364da2661108","tags":["Mailing List"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.openwall.com/lists/oss-security/2025/12/11/2","name":"https://www.openwall.com/lists/oss-security/2025/12/11/2","refsource":"cve@mitre.org","tags":["Mailing List"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt","name":"https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt","refsource":"cve@mitre.org","tags":["Vendor Advisory"],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2025-67896","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2025-67896","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"Exim","product":"Exim","version":"affected 4.99 4.99.1 custom","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[{"cve_year":"2025","cve_id":"67896","vulnerable":"1","versionEndIncluding":"","cpe1":"cpe","cpe2":"2.3","cpe3":"a","cpe4":"exim","cpe5":"exim","cpe6":"*","cpe7":"*","cpe8":"*","cpe9":"*","cpe10":"*","cpe11":"*","cpe12":"*","cpe13":"*"}],"vendor_comments":[],"enrichments":{"kev":null,"epss":null,"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"providerMetadata":{"dateUpdated":"2025-12-18T23:04:16.938Z","orgId":"af854a3a-2127-422b-91ae-364da2661108","shortName":"CVE"},"references":[{"url":"http://www.openwall.com/lists/oss-security/2025/12/14/1"},{"url":"http://www.openwall.com/lists/oss-security/2025/12/18/3"}],"title":"CVE Program Container"},{"metrics":[{"other":{"content":{"id":"CVE-2025-67896","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","timestamp":"2025-12-15T21:27:33.707603Z","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2025-12-15T21:27:45.955Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unknown","product":"Exim","vendor":"Exim","versions":[{"lessThan":"4.99.1","status":"affected","version":"4.99","versionType":"custom"}]}],"cpeApplicability":[{"nodes":[{"cpeMatch":[{"criteria":"cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*","versionEndExcluding":"4.99.1","versionStartIncluding":"4.99","vulnerable":true}],"negate":false,"operator":"OR"}]}],"descriptions":[{"lang":"en","value":"Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation."}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","version":"3.1"},"format":"CVSS","scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-122","description":"CWE-122 Heap-based Buffer Overflow","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2025-12-18T17:25:18.900Z","orgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","shortName":"mitre"},"references":[{"url":"https://www.openwall.com/lists/oss-security/2025/12/11/2"},{"url":"https://exim.org/static/doc/security/"},{"url":"https://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt"}],"x_generator":{"engine":"CVE-Request-form 0.0.1"}}},"cveMetadata":{"assignerOrgId":"8254265b-2729-46b6-b9e3-3dfca2d5bfca","assignerShortName":"mitre","cveId":"CVE-2025-67896","datePublished":"2025-12-14T04:00:24.337Z","dateReserved":"2025-12-14T04:00:24.063Z","dateUpdated":"2025-12-18T23:04:16.938Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2025-12-14 04:15:50","lastModifiedDate":"2026-10-14 13:10:00","problem_types":["CWE-122","CWE-122 CWE-122 Heap-based Buffer Overflow"],"metrics":{"cvssMetricV31":[{"source":"cve@mitre.org","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L","baseScore":7,"baseSeverity":"HIGH","attackVector":"NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"HIGH","availabilityImpact":"LOW"},"exploitabilityScore":2.2,"impactScore":4.7},{"source":"nvd@nist.gov","type":"Primary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":9.8,"baseSeverity":"CRITICAL","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":3.9,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2025-12-15T21:27:33.707603Z","id":"CVE-2025-67896","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[{"nodes":[{"operator":"OR","negate":false,"cpeMatch":[{"vulnerable":true,"criteria":"cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*","versionEndExcluding":"4.99.1","matchCriteriaId":"20F1D6C2-EF2C-4F7E-9BE0-F5EC1A2CB8DF"}]}]}]},"legacy_mitre":{"record":{"CveYear":"2025","CveId":"67896","Ordinal":"1","Title":"CVE-2025-67896","CVE":"CVE-2025-67896","Year":"2025"},"notes":[{"CveYear":"2025","CveId":"67896","Ordinal":"1","NoteData":"Exim before 4.99.1, with certain non-default rate-limit configurations, allows a remote heap-based buffer overflow because database records are cast directly to internal structures without validation.","Type":"Description","Title":"CVE-2025-67896"}]}}}