Windows Server
PoC exploit released for critical AD CS domain-takeover flaw (CVE-2026-54121)
Security researchers who discovered and reported CVE-2026-54121 (aka “Certighost”), a critical privilege elevation vulnerability in Active Directory Certificate …
Microsoft tightens Windows enterprise activation security
Microsoft is making Trusted Platform Module (TPM)-backed attestation a requirement for Windows Key Management Service (KMS), the on-premises service used for Windows volume …
Windows Netlogon RCE exploited, domain controllers at risk (CVE-2026-41089)
CVE-2026-41089, a critical Windows Netlogon RCE flaw that allows remote code execution, is now actively exploited in the wild, the Centre for Cybersecurity Belgium (CCB) …
Microsoft provides mitigation for “YellowKey” BitLocker bypass flaw (CVE-2026-45585)
Microsoft is working on a fix for CVE-2026-45585 (aka “Yellowkey”), a vulnerability that can be used by attackers to bypass protections offered by BitLocker, the …
Microsoft May 2026 Patch Tuesday: Many fixes, but no zero-days
Microsoft has marked May 2026 Patch Tuesday by releasing fixes for 120+ CVE-numbered vulnerabilities, none of which (for a change) are actively exploited or have been publicly …
CISA, Microsoft warn of active exploitation of Windows Shell vulnerability (CVE-2026-32202)
Attackers are exploiting CVE-2026-32202, a zero-click Windows Shell spoofing vulnerability that causes victims’ systems to authenticate the attacker’s server, CISA …
BlueHammer: Windows zero-day exploit leaked
A buggy but functional proof-of-concept (PoC) exploit for an unpatched Windows local privilege escalation vulnerability dubbed BlueHammer has been published on GitHub by …
Attackers use Windows App-V scripts to slip infostealer past enterprise defenses
A malware delivery campaign detailed by Blackpoint researchers employs an impressive array of tricks to deliver an infostealer to employees without triggering enterprise …
Attackers exploiting WSUS vulnerability drop Skuld infostealer (CVE-2025-59287)
Attackers have been spotted exploiting the recently patched WSUS vulnerability (CVE-2025-59287) to deploy infostealer malware on unpatched Windows servers. An out-of-band …
Microsoft releases urgent fix for actively exploited WSUS vulnerability (CVE-2025-59287)
Microsoft has released an out-of-band security update that “comprehensively” addresses CVE-2025-59287, a remote code execution vulnerability in the Windows Server …
CISA warns of Windows SMB flaw under active exploitation (CVE-2025-33073)
CVE-2025-33073, a Windows SMB Client vulnerability that Microsoft fixed in June 2025, is being exploited by attackers. The confirmation comes from the Cybersecurity and …
Win-DDoS: Attackers can turn public domain controllers into DDoS agents
SafeBreach researchers have released details on several vulnerabilities that could be exploited by attackers to crash Windows Active Directory domain controllers (DCs), one …
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