Windows Server
Unpatched Windows Server vulnerability allows full domain compromise
A privilege escalation vulnerability in Windows Server 2025 can be used by attackers to compromise any user in Active Directory (AD), including Domain Admins. “The …
Microsoft fixes actively exploited Windows CLFS zero-day (CVE-2025-29824)
April 2025 Patch Tuesday is here, and Microsoft has delivered fixes for 120+ vulnerabilities, including a zero-day (CVE-2025-29824) that’s under active attack. …
Microsoft fixes two actively exploited zero-days (CVE-2025-21418, CVE-2025-21391)
February 2025 Patch Tuesday is here, and Microsoft has delivered fixes for 56 vulnerabilities, including two zero-days – CVE-2025-21418 and CVE-2025-21391 – under …
Microsoft fixes actively exploited Windows Hyper-V zero-day flaws
Microsoft has marked January 2025 Patch Tuesday with a hefty load of patches: 157 CVE-numbered security issues have been fixed in various products, three of which (in Hyper-V) …
Microsoft enforces defenses preventing NTLM relay attacks
Since making Kerberos the default Windows authentication protocol in 2000, Microsoft has been working on eventually retiring NTLM, its less secure and obsolete counterpart. …
Microsoft fixes exploited zero-day (CVE-2024-49138)
On December 2024 Patch Tuesday, Microsoft resolved 71 vulnerabilities in a variety of its products, including a zero-day (CVE-2024-49138) that’s been exploited by …
How a Windows zero-day was exploited in the wild for months (CVE-2024-43451)
CVE-2024-43451, a Windows zero-day vulnerability for which Microsoft released a fix on November 2024 Patch Tuesday, has been exploited since at least April 2024, ClearSky …
Microsoft fixes actively exploited zero-days (CVE-2024-43451, CVE-2024-49039)
November 2024 Patch Tuesday is here, and Microsoft has dropped fixes for 89 new security issues in its various products, two of which – CVE-2024-43451 and CVE-2024-49039 …
Windows Server 2025 gets hotpatching option, without reboots
Organizations that plan to upgrade to Windows Server 2025 once it becomes generally available will be able to implement some security updates by hotpatching running processes. …
“Perfect” Windows downgrade attack turns fixed vulnerabilities into zero-days
A researcher has developed a downgrade attack that can make Windows machines covertly, persistently and irreversibly vulnerable, even if they were fully patched before that. A …
Microsoft releases tool to speed up recovery of systems borked by CrowdStrike update
By now, most people are aware of – or have been personally affected by – the largest IT outage the world have ever witnessed, courtesy of a defective update for …
A zero-day vulnerability (and PoC) to blind defenses relying on Windows event logs
A zero-day vulnerability that, when triggered, could crash the Windows Event Log service on all supported (and some legacy) versions of Windows could spell trouble for …
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