High [CVE-2026-69858] Windows DNS Server Remote Code Execution Vulnerability
This high-severity Microsoft Server advisory covers CVE-2026-69858 affecting Windows Server 2022, Windows Server 2025 (Server Core installation).
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Summary
Use after free in Windows DNS allows an unauthorized attacker to execute code over a network.
Affected products named by the advisory: Windows Server 2022; Windows Server 2025; Windows Server 2025 (Server Core installation).
- Windows Server 2022 10.0.20348.0 before 10.0.20348.5622
- Windows Server 2025 10.0.26100.0 before 10.0.26100.33438
- Windows Server 2025 (Server Core installation) 10.0.26100.0 before 10.0.26100.33438
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
- 10.0.20348.5622
- 10.0.26100.33438
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 10.0.20348.5622, 10.0.26100.33438. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 2 hours ago·verify at source
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