CVE-2026-83889
Windows DNS Server Remote Code Execution vulnerability
MSRC advisory October 13, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-83889
- Affected products
- Windows DNS Server Remote Code Execution · Microsoft Windows DNS Server Remote Code Execution · Microsoft
What happened
Release of invalid pointer or reference in DNS Server allows an authorized attacker to execute code over a network.
What it means for your business
Windows DNS Server Remote Code Execution vulnerability (CVE-2026-83889) was added to Microsoft’s security update guidance. Release of invalid pointer or reference in DNS Server allows an authorized attacker to execute code over a network. If you need help checking exposure, call (864) 335-9223.
Sources
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