Is CVE-2024-39929 in the CISA KEV catalog?

No. CVE-2024-39929 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2024-39929?

CVE-2024-39929 has a CVSS v3 base score of 5.4 (MEDIUM).

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

CVE-2024-39929 has an EPSS score of 41.23% (99th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2024-39929?

Upgrade exim4 on debian 11 to 4.94.2-7+deb11u3 or later. Fixes are available for 4 affected products.

CVE & CISA-KEV Catalog

CVE-2024-39929

MEDIUMEPSS 99th pctl

5.4

CVSS v3

NVD

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.

CWE-116

How to fix

Remediation Available

exim4Debian

Fixed in:4.94.2-7+deb11u3CVE-2024-39929

Fixed in:4.96-15+deb12u5CVE-2024-39929

Fixed in:4.98~RC3-2CVE-2024-39929

exim4Ubuntu

Fixed in:4.86.2-2ubuntu2.6+esm8USN-6939-1

Fixed in:4.90.1-1ubuntu1.10+esm5USN-6939-1

Fixed in:4.93-13ubuntu1.12USN-6939-1

Fixed in:4.95-4ubuntu2.6USN-6939-1

Fixed in:4.97-4ubuntu4.1USN-6939-1

exim4-baseUbuntu

Fixed in:4.86.2-2ubuntu2.6+esm8USN-6939-1

Fixed in:4.90.1-1ubuntu1.10+esm5USN-6939-1

Fixed in:4.93-13ubuntu1.12USN-6939-1

Fixed in:4.95-4ubuntu2.6USN-6939-1

Fixed in:4.97-4ubuntu4.1USN-6939-1

eximon4Ubuntu

Fixed in:4.86.2-2ubuntu2.6+esm8USN-6939-1

Fixed in:4.90.1-1ubuntu1.10+esm5USN-6939-1

Fixed in:4.93-13ubuntu1.12USN-6939-1

Fixed in:4.95-4ubuntu2.6USN-6939-1

Fixed in:4.97-4ubuntu4.1USN-6939-1

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v3 Vector

Exploitability

Attack VectorNetwork

Attack ComplexityLow

Privileges RequiredNone

User InteractionRequired

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityNone

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N

Exploit Intelligence

41.23%probability of exploitation in 30 days

99thpercentile

Very high risk: more likely to be exploited than 99% of all known CVEs.

References

Patch2

Exploit1

bugs.exim.org

Release Notes1

github.com

Other references1

rfc-editor.org

Related Vulnerabilities

Other CWE-116 vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2024-38475	Critical	9.1	100%	KEV	Fix
CVE-2022-36446	Critical	9.8	96%	-	Fix
CVE-2021-31806	Medium	6.5	96%	-	Fix
CVE-2022-30781	High	7.5	88%	-	Fix
CVE-2022-36099	Critical	9.9	76%	-	Fix
CVE-2022-36100	Critical	9.9	74%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2025-07-10.