CVE-2026-69858 Use after free in Windows DNS allows an unauthorized attacker to execute code over a network

Description

Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.

Affected products and versions

Product	Affected versions	Fixed in
Windows Server 2022 10.0	10.0.20348.0 → < 10.0.20348.5622	10.0.20348.5622
Windows Server 2025 10.0	10.0.26100.0 → < 10.0.26100.33438	10.0.26100.33438
Windows Server 2025 (Server Core installation) 10.0	10.0.26100.0 → < 10.0.26100.33438	10.0.26100.33438

Other CVEs of Windows Server 2022

The 5112 CVEs of Windows Server 2022 →

CVE-2026-105016 Heap-based buffer overflow in Microsoft QUIC allows an unauthorized attacker to execute code over a network 9.8 Critical CVE-2026-108136 Use after free in Microsoft Windows Search Component allows an authorized attacker to elevate privileges locally 7.8 High CVE-2026-108133 Release of invalid pointer or reference in Windows Modern Device Management (MDM) allows an authorized attacker to… 7.8 High CVE-2026-108129 Out-of-bounds read in DNS Server allows an authorized attacker to disclose information over a network 6.5 Medium