What is CVE-2020-37127?

CVE-2020-37127 is a medium-severity vulnerability in Dnsmasq Dnsmasq-Utils, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-02-05.

How severe is CVE-2020-37127?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Buffer overflow in Dnsmasq Dnsmasq-Utils

CVE-2020-37127

Dnsmasq-utils 2.79-1 contains a buffer overflow vulnerability in the dhcp_release utility that allows attackers to cause a denial of service by supplying excessive input. Attackers can trigger a core dump and terminate the dhcp_release process by sending a crafted input string longer than 16 characters.

Vulnerability class: Buffer Overflow

EPSS: 0.002 (8.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

Affected products

Dnsmasq Dnsmasq-utils — versions 2.79

Weakness classification (CWE)

CWE-121 — Stack-based Buffer Overflow

References

disclosure@vulncheck.com (exploit)
disclosure@vulncheck.com (product)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2020-37127?: CVE-2020-37127 is a medium-severity vulnerability in Dnsmasq Dnsmasq-Utils, classified under Stack-based Buffer Overflow. CVSS score: 5.5/10. Published 2026-02-05.
How severe is CVE-2020-37127?: Medium severity. CVSS v3 base score is 5.5 out of 10.