Is CVE-2023-42114 in the CISA KEV catalog?

No. CVE-2023-42114 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2023-42114?

CVE-2023-42114 has a CVSS v3 base score of 5.3 (MEDIUM).

What is the EPSS score for CVE-2023-42114?

CVE-2023-42114 has an EPSS score of 28.08% (98th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2023-42114?

Upgrade exim4 on debian 11 to 4.94.2-7+deb11u1 or later. Fixes are available for 6 affected products.

CVE & CISA-KEV Catalog

CVE-2023-42114

MEDIUMEPSS 98th pctl

5.3

CVSS v3

NVD

Description

Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper validation of user-supplied data, which can result in a read past the end of an allocated data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account. . Was ZDI-CAN-17433.

CWE-125Out-of-bounds Read

How to fix

Remediation Available

exim4Debian

Fixed in:4.94.2-7+deb11u1CVE-2023-42114

Fixed in:4.96-15+deb12u2CVE-2023-42114

Fixed in:4.97~RC1-2CVE-2023-42114

exim4Ubuntu

Fixed in:4.82-3ubuntu2.4+esm6USN-6411-1

Fixed in:4.86.2-2ubuntu2.6+esm4USN-6411-1

Fixed in:4.90.1-1ubuntu1.10+esm1USN-6411-1

Fixed in:4.93-13ubuntu1.8USN-6411-1

Fixed in:4.95-4ubuntu2.3USN-6411-1

Fixed in:4.96-14ubuntu1.2USN-6411-1

exim4-baseUbuntu

Fixed in:4.82-3ubuntu2.4+esm6USN-6411-1

Fixed in:4.86.2-2ubuntu2.6+esm4USN-6411-1

Fixed in:4.90.1-1ubuntu1.10+esm1USN-6411-1

Fixed in:4.93-13ubuntu1.8USN-6411-1

Fixed in:4.95-4ubuntu2.3USN-6411-1

Fixed in:4.96-14ubuntu1.2USN-6411-1

exim4-daemon-heavyUbuntu

Fixed in:4.82-3ubuntu2.4+esm6USN-6411-1

Fixed in:4.86.2-2ubuntu2.6+esm4USN-6411-1

Fixed in:4.90.1-1ubuntu1.10+esm1USN-6411-1

Fixed in:4.93-13ubuntu1.8USN-6411-1

Fixed in:4.95-4ubuntu2.3USN-6411-1

Fixed in:4.96-14ubuntu1.2USN-6411-1

exim4-daemon-lightUbuntu

Fixed in:4.82-3ubuntu2.4+esm6USN-6411-1

Fixed in:4.86.2-2ubuntu2.6+esm4USN-6411-1

Fixed in:4.90.1-1ubuntu1.10+esm1USN-6411-1

Fixed in:4.93-13ubuntu1.8USN-6411-1

Fixed in:4.95-4ubuntu2.3USN-6411-1

Fixed in:4.96-14ubuntu1.2USN-6411-1

eximon4Ubuntu

Fixed in:4.82-3ubuntu2.4+esm6USN-6411-1

Fixed in:4.86.2-2ubuntu2.6+esm4USN-6411-1

Fixed in:4.90.1-1ubuntu1.10+esm1USN-6411-1

Fixed in:4.93-13ubuntu1.8USN-6411-1

Fixed in:4.95-4ubuntu2.3USN-6411-1

Fixed in:4.96-14ubuntu1.2USN-6411-1

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 InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityNone

AvailabilityNone

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

Exploit Intelligence

28.08%probability of exploitation in 30 days

98thpercentile

Very high risk: more likely to be exploited than 98% of all known CVEs.

References

Third-Party Advisory1

zerodayinitiative.com

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-125 (Out-of-bounds Read) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2014-0160	High	7.5	100%	KEV	Fix
CVE-2025-5777	High	7.5	100%	KEV + Ransom	Fix
CVE-2021-4034	High	7.8	95%	KEV	Fix
CVE-2023-21769	High	7.5	92%	-	Fix
CVE-2020-8794	Critical	9.8	89%	-	Fix
CVE-2023-49285	High	8.6	89%	-	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 2025-11-04.