Is CVE-2024-39929 actively exploited?

CVE-2024-39929 has no public evidence of in-the-wild exploitation as of 2025-07-10.

What is the CVSS score for CVE-2024-39929?

CVE-2024-39929 has a CVSS score of 5.4 (MEDIUM severity). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N.

How do I patch CVE-2024-39929?

Patch guidance is available from exim security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2024-39929.

CVE-2024-39929 - remediation guidance & executive summary

Description

Exim through 4.97.1 misparses a multiline RFC 2231 header filename, and thus remote attackers can bypass a $mime_filename extension-blocking protection mechanism, and potentially deliver executable attachments to the mailboxes of end users.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N
Attack Vector: network
Complexity: low
Privileges: none
User Action: required
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: none
Weaknesses: CWE-116

Metadata

Primary Vendor: EXIM
Published: 7/4/2024
Last Modified: 7/10/2025
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

CVE-2024-39929

Description

CVSS Metrics

Metadata

Affected Products

Remediation Guidance

Executive Summary