CVE-2026-96177 · Infrastructure
NO FIX YET
A use-after-free bug in the Microsoft DNS Server component lets an unauthorized attacker run code over the network. The sources give a CVSS score of 8.1 but name no affected versions or fix.
first public Nov 10, 2026 · 2 sources
Could this affect your app?
Free first check from your website. Connect your repo for the full answer.
Windows servers running the DNS Server role are the systems to look at: the bug is a use-after-free reachable over the network without authentication (CVSS 8.1, high attack complexity). Exact Windows versions are not confirmed yet. Machines without the DNS Server role, and clients that only use DNS, can likely skip it once MSRC confirms.
Not affected if no-dns-server-role
Who cares dns-server, windows, windows-server
No fix yet, per the sources.
Use after free in DNS Server allows an unauthorized attacker to execute code over a network.
This page as .md · .json · CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD data is provided by NIST and is public domain. Posts quoted belong to their authors.
Check it with your coding agent
It reads this page and tells you if your code is affected.
Are you affected?
Ask from here. InfraStack checks the affected versions against your stack and answers in your inbox.
InfraStack checks the affected versions against your stack and answers in Slack, with the evidence and the fix.