Is CVE-2022-3620 in the CISA KEV catalog?

No. CVE-2022-3620 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2022-3620?

CVE-2022-3620 has a CVSS v3 base score of 5.6 (MEDIUM).

What is the EPSS score for CVE-2022-3620?

CVE-2022-3620 has an EPSS score of 0.73% (50th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2022-3620?

Upgrade exim4 on debian 12 to 4.96-7 or later.

CVE & CISA-KEV Catalog

CVE-2022-3620

MEDIUM

5.6

CVSS v3

NVD

Description

A vulnerability was found in Exim and classified as problematic. This issue affects the function dmarc_dns_lookup of the file dmarc.c of the component DMARC Handler. The manipulation leads to use after free. The attack may be initiated remotely. The name of the patch is 12fb3842f81bcbd4a4519d5728f2d7e0e3ca1445. It is recommended to apply a patch to fix this issue. The associated identifier of this vulnerability is VDB-211919.

CWE-119Buffer Overflow CWE-416Use After Free

How to fix

Remediation Available

exim4Debian

Fixed in:4.96-7CVE-2022-3620

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 ComplexityHigh

Privileges RequiredNone

User InteractionNone

ScopeUnchanged

Impact

ConfidentialityLow

IntegrityLow

AvailabilityLow

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

Exploit Intelligence

0.73%probability of exploitation in 30 days

50thpercentile

Moderate risk: more likely to be exploited than 50% of all known CVEs.

References

Patch1

git.exim.org

Third-Party Advisory4

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%	-	-

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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 2025-05-23.