Domain Controller
The latest Domain Controller coverage — news, analysis, and updates from the WindowsNews.AI desk.
Critical Windows LSASS Bug Exposes Domain Controllers to Authentication DoS Attacks
Microsoft’s latest security advisory for CVE-2025-53809 details a network-exploitable denial-of-service flaw in the Windows Local Security Authority Subsystem Service, the bedrock of authentication...
Windows Server 2019 Safe Mode: BCDEdit, WinRE, and DSRM Recovery Tactics
A botched BCDEdit command can turn a routine reboot into a server-down emergency. Yet Safe Mode remains the go-to diagnostic startup for Windows Server 2019, offering a stripped-down environment to...
Kerberos CVE-2025-26647 Hardening Causes Authentication Chaos: The Full Story of Audit-to-Enforce and NTAuth Requirements
Microsoft’s April 2025 security updates introduced mandatory Kerberos protections for CVE-2025-26647, but the enforcement phase triggered a cascade of authentication failures across enterprise...
Last Call for Certificate Compatibility: Microsoft Mandates Strong Mappings on Windows DCs Sept 10
Microsoft will permanently disable the compatibility mode for certificate-to-account mappings on Windows domain controllers on September 10, 2025, forcing organizations still relying on weak...
Windows Server 2025 Schema Master Flaw Triggers Duplicate AD Entries, Halts Replication
Administrators deploying Windows Server 2025 domain controllers are grappling with a severe replication failure caused by a bug in the Schema Master FSMO role. The flaw generates duplicate entries...
CISA Emergency Directive Targets Exchange Hybrid Flaw in August Patch Tuesday Deluge
The Cybersecurity and Infrastructure Security Agency (CISA) issued an emergency directive late Tuesday, ordering federal agencies to secure on-premises Exchange servers within hours after a newly...
KB5063880: Microsoft Fortifies Server 2022 Netlogon, Raises Red Flag on June 2026 Secure Boot Expiry
Microsoft’s August 12, 2025 cumulative update for Windows Server 2022 doesn’t just patch bugs—it closes a quartet of remotely exploitable denial-of-service flaws in the Netlogon protocol and...
Domain Controllers at Risk: Microsoft’s August Update Closes Kerberos dMSA Vulnerability Amid 100+ Fixes
Microsoft’s August 2025 Patch Tuesday release lands with an urgent fix for a Kerberos vulnerability that could allow attackers to escalate to domain administrator, alongside more than a dozen other...
CVE-2025-53779: New Kerberos Path Traversal Bug Opens Door to Privilege Escalation—Patch Now
Microsoft’s security team has published guidance for CVE-2025-53779, a newly disclosed vulnerability in Windows Kerberos that could let authenticated attackers on the network elevate their...
CVE-2025-33057: Microsoft Patches LSASS Null Pointer DoS That Can Crash Domain Controllers
Microsoft has released a security update for a vulnerability that allows an attacker with network access to crash the Local Security Authority Subsystem Service (LSASS) and trigger a...
Microsoft Patches Win-DDoS Flaws: Critical Update Blocks Attackers from Turning DCs into DDoS Amplifiers
Microsoft’s July 2025 Patch Tuesday delivered a knockout blow to a dangerous new attack technique that could transform unpatched Windows domain controllers into unwitting participants in massive...
Microsoft Patches Zero-Click LDAPNightmare Exploits That Crash Domain Controllers (CVE-2024-49112/49113)
SafeBreach Labs researchers dropped a bombshell at DEF CON with a zero-click exploit chain that weaponizes Windows LDAP protocol handling to crash Domain Controllers or, in the worst case, execute...