What is CVE-2026-4437?

CVE-2026-4437 is a security advisory published by Microsoft Security Response Center (MSRC) with Medium severity. gethostbyaddr and gethostbyaddr_r may incorrectly handle DNS response

Which CVE IDs does CVE-2026-4437 cover?

CVE-2026-4437 covers the following CVE IDs: CVE-2026-4437. Each CVE has its own detail page on EchelonGraph Pulse with the synthesized EG score.

What is the CVSS v3 score of CVE-2026-4437?

CVE-2026-4437 has a CVSS v3 base score of 5.9, published by Microsoft Security Response Center (MSRC).

CVE-2026-4437MediumCVSS 5.9

gethostbyaddr and gethostbyaddr_r may incorrectly handle DNS response

Vendor

Microsoft Security Response Center (MSRC)

Published

May 31, 2026

Last Modified

—

🔗 CVE IDs covered (1)

CVE-2026-4437 →