CVE-2026-69813

Updated last night, no issues immediately visible.

Users this morning all have login prompts to access mapped drives/folder redirections.

No creds working.

I can log in locally as a Domain Admin, but trying to open DNS console or run any DNS powershell commands just gives me Access Denied.

DNS still resolves, and the domain services are all still running, but something has happened with authentication/permissions.

Currently rolling back KB5122882 in the hope it was that.

Anyone else issues this morning?

EDIT: https://www.rapid7.com/db/vulnerabilities/cve-2026-69813/

Looks like this KB might have touched DNS code - roll back in progress.

EDIT2 & Fix: Rolled back the KB but the issue persisted - ended up resetting the DC's secure channel to itself which resolved the issue fully. The issue happened at exactly the moment at which the update was installed last night - either the update did indeed cause the issue which persisted in being broken even once rolled back, or it's a heck of a coincidence.