CVE-2025-67896

HIGHNVD 7.06.4▼

7.0

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.

CVSS v3: 7.0
EG Score: 6.4(medium)
EPSS: 22.6%
KEV: Not listed

Published

December 14, 2025

Last Modified

December 22, 2025

References (5)

cve@mitrehttps://exim.org/static/doc/security/
cve@mitrehttps://exim.org/static/doc/security/EXIM-Security-2025-12-09.1/report.txt
cve@mitrehttps://www.openwall.com/lists/oss-security/2025/12/11/2
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/12/14/1
af854a3a-2127-422b-91ae-364da2661108http://www.openwall.com/lists/oss-security/2025/12/18/3

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

CWE-122Heap-based Buffer Overflow

Data Freshness Timeline

(refreshed 14× in last 7d / 18× in last 30d)

Every time one of our enrichment pipelines (NVD, MITRE cvelistV5, EPSS, CISA KEV, GHSA, OSV, vendor advisories) ran against this CVE. Most recent first.

2026-06-05 22:46 UTCepss_batch
2026-06-05 22:46 UTCepss_batch
2026-06-05 06:10 UTCepss_batch
2026-06-05 06:10 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-04 13:12 UTCepss_batch
2026-06-02 20:13 UTCepss_batch
2026-06-02 20:12 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-06-01 13:51 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 22:30 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-31 00:16 UTCepss_batch
2026-05-29 17:37 UTCEG score recompute
2026-05-29 17:37 UTCGHSA enrichment
2026-05-29 14:57 UTCOSV refresh
2026-05-29 13:44 UTCepss_batch

Frequently asked(5)

What is CVE-2025-67896?

CVE-2025-67896 is a high vulnerability published on December 14, 2025. 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.

When was CVE-2025-67896 disclosed?

CVE-2025-67896 was first published in the National Vulnerability Database on December 14, 2025, with the most recent update on December 22, 2025. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.

Is CVE-2025-67896 actively exploited?

CVE-2025-67896 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 22.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.

What is the CVSS score of CVE-2025-67896?

CVE-2025-67896 has a CVSS v3 base score of 7.0 (NVD). EchelonGraph synthesises NVD + CISA KEV + FIRST EPSS + GHSA into a combined EG score of 6.4.

How do I remediate CVE-2025-67896?

Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2025-67896, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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CVE-2025-67896

📅 Published

🔄 Last Modified

🔗 References (5)

Weakness Classification(1)

Data Freshness Timeline

❓ Frequently asked(5)

Dependency Blast Radius

Is Your Infrastructure Affected by CVE-2025-67896?

🔗 Related CVEs(same CWE)

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Published

Last Modified

References (5)

Frequently asked(5)

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