Is CVE-2022-3559 in the CISA KEV catalog?

No. CVE-2022-3559 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-3559?

CVE-2022-3559 has a CVSS v3 base score of 4.6 (MEDIUM).

What is the EPSS score for CVE-2022-3559?

CVE-2022-3559 has an EPSS score of 3.66% (88th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-3559?

Upgrade exim4 on debian 11 to 4.94.2-7+deb11u4 or later. Fixes are available for 5 affected products.

CVE & CISA-KEV Catalog

CVE-2022-3559

MEDIUMEPSS 88th pctl

4.6

CVSS v3

NVD

Description

A vulnerability was found in Exim and classified as problematic. This issue affects some unknown processing of the component Regex Handler. The manipulation leads to use after free. The name of the patch is 4e9ed49f8f12eb331b29bd5b6dc3693c520fddc2. It is recommended to apply a patch to fix this issue. The identifier VDB-211073 was assigned to this vulnerability.

CWE-119Buffer Overflow CWE-416Use After Free

How to fix

Remediation Available

exim4Debian

Fixed in:4.94.2-7+deb11u4CVE-2022-3559

Fixed in:4.96-4CVE-2022-3559

exim4Ubuntu

Fixed in:4.90.1-1ubuntu1.10USN-5741-1

Fixed in:4.93-13ubuntu1.7USN-5741-1

Fixed in:4.95-4ubuntu2.2USN-5741-1

Fixed in:4.96-3ubuntu1.1USN-5741-1

exim4-baseUbuntu

Fixed in:4.90.1-1ubuntu1.10USN-5741-1

Fixed in:4.93-13ubuntu1.7USN-5741-1

Fixed in:4.95-4ubuntu2.2USN-5741-1

Fixed in:4.96-3ubuntu1.1USN-5741-1

exim4-daemon-heavyUbuntu

Fixed in:4.90.1-1ubuntu1.10USN-5741-1

Fixed in:4.93-13ubuntu1.7USN-5741-1

Fixed in:4.95-4ubuntu2.2USN-5741-1

Fixed in:4.96-3ubuntu1.1USN-5741-1

exim4-daemon-lightUbuntu

Fixed in:4.90.1-1ubuntu1.10USN-5741-1

Fixed in:4.93-13ubuntu1.7USN-5741-1

Fixed in:4.95-4ubuntu2.2USN-5741-1

Fixed in:4.96-3ubuntu1.1USN-5741-1

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 VectorAdjacent

Attack ComplexityHigh

Privileges RequiredLow

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

3.66%probability of exploitation in 30 days

88thpercentile

Elevated risk: more likely to be exploited than 88% of all known CVEs.

References

Patch2

Third-Party Advisory4

Other references1

lists.debian.org

Related Vulnerabilities

Other CWE-119 (Buffer Overflow) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-4966	Critical	9.4	100%	KEV + Ransom	Fix
CVE-2017-11882	High	7.8	100%	KEV + Ransom	-
CVE-2020-0796	Critical	10.0	100%	KEV + Ransom	-
CVE-2008-4250	Critical	9.8	99%	KEV	-
CVE-2017-15944	Critical	9.8	98%	KEV	Fix
CVE-2015-0014	High	10.0	97%	-	-

Embed a live status badge for CVE-2022-3559

Markdown

[![CVE-2022-3559](https://tridentstack.com/cve/badge/CVE-2022-3559.svg)](https://tridentstack.com/cve/CVE-2022-3559)

HTML

<a href="https://tridentstack.com/cve/CVE-2022-3559"><img src="https://tridentstack.com/cve/badge/CVE-2022-3559.svg" alt="CVE-2022-3559"></a>

Find and fix vulnerabilities across your fleet

TridentStack Control continuously scans your Windows, macOS, and Linux fleet for known vulnerabilities, prioritizes them by severity and active exploitation, and patches them automatically.

Start free

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 2025-11-03.