CVE-2026-50518

critical

Description

Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

References

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-50518

https://www.securityweek.com/microsoft-patches-record-622-vulnerabilities-including-two-exploited-zero-days/

https://securityaffairs.com/195347/security/patch-tuesday-security-updates-for-july-2026-the-largest-update-ever-621-cves-in-one-month.html

https://www.tenable.com/blog/microsofts-july-2026-patch-tuesday-addresses-569-cves-cve-2026-56155-cve-2026-56164

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-44117

Details

Source: Mitre, NVD

Published: 2026-07-14

Updated: 2026-07-22

Risk Information

CVSS v2

Base Score: 10

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

Severity: Critical

CVSS v3

Base Score: 9.8

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

Severity: Critical

EPSS

EPSS: 0.00974