Is CVE-2025-67896 actively exploited?

CVE-2025-67896 has no public evidence of in-the-wild exploitation as of 2025-12-22.

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

CVE-2025-67896 has a CVSS score of 7 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L.

How do I patch CVE-2025-67896?

Patch guidance is available from exim security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2025-67896.

Fix CVE-2025-67896 - HIGH exim exim

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:H/A:L
Attack Vector: network
Complexity: high
Privileges: none
User Action: none
Scope: unchanged
Confidentiality: low
Integrity: high
Availability: low
Weaknesses: CWE-122

Metadata

Primary Vendor: EXIM
Published: 12/14/2025
Last Modified: 12/22/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2025-67896

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary