kerberos security

Microsoft has quietly but deliberately set a firm deadline to end a decades‑long compatibility compromise: RC4 (RC4‑HMAC) will no longer be the assumed, permissive fallback for Kerberos ticket encryption on Windows domain controllers, and Microsoft has delivered a staged rollout tied to...

Microsoft’s tracking entry for CVE-2026-20849 records an elevation‑of‑privilege defect in the Windows Kerberos authentication stack, but the public advisory is deliberately concise: the vendor confirms the vulnerability’s existence while publishing limited low‑level exploit detail — a disclosure...

Microsoft’s security portal registers CVE-2026-20849 as a Kerberos-related elevation-of-privilege vulnerability in Windows, and the entry — while authoritative about impact class — leaves critical exploit mechanics and low-level root causes deliberately sparse; the vendor’s confidence signal...