High SEVERITY — Vulnerability

CVE-2026-62823 — Heap-based buffer overflow in Windows DHCP Server allows an unauthorized attacker to execute code over an adjacent netwo

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

Platform

Windows Server

CVE Record

CVE-2026-62823

CVSS Score

8.8/10

Published

11 August 2026

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Summary

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

Assessment

CVE: CVE-2026-62823
CVSS base score: 8.8
Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: NVD record

References

msrc.microsoft.com

Action

Verify affected systems against your inventory
Apply the vendor patch during a maintenance window
Restrict access at the network layer until patched

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CVE-2026-69266 — Integer overflow or wraparound in Windows DHCP Server allows an unauthorized attacker to execute code over a network.

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Critical

CVE-2026-85880 — Microsoft Windows Heap-Based Buffer Overflow Vulnerability

Microsoft Windows Advanced Local Procedure Call contains a heap-based buffer overflow vulnerability that allows an attacker to elevate privileges locally.

CVE-2026-85880 CISA-KEV Vulnerability 40