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Microsoft has released the Windows 10 KB5094127 extended security update, which fixes the June 2026 Patch Tuesday vulnerabilities and adds new functionality to monitor the rollout of updated Secure Boot certificates that replace those expiring this month. [...]
Microsoft and Resecurity disrupted Fox Tempest, a malware-signing service that used fake Microsoft certificates to make malware look legitimate. Resecurity supported Microsoft’s Digital Crimes Unit (DCU) in its disruption of Fox Tempest, a financially motivated threat actor operating a malware-signing-as-a-service (MSaaS) capability used by cybercriminals to make malicious files appear legitimate. On May 19, 2026, […]
Microsoft says it has disrupted a malware-signing-as-a-service (MSaaS) operation that abused the company's Artifact Signing service to generate fraudulent code-signing certificates used by ransomware gangs and other cybercriminals. [...]
Microsoft Defender is detecting legitimate DigiCert root certificates as Trojan:Win32/Cerdigent.A!dha, resulting in widespread false-positive alerts, and in some cases, removing certificates from Windows. [...]
The Secure Boot refresh is one of the largest coordinated security maintenance efforts across the Windows ecosystem, Microsoft said. In other words, update those PCs soon.
A Florida woman was sentenced to 22 months in prison for running a massive years-long scheme to traffic thousands of stolen Microsoft Certificate of Authenticity (COA) labels. [...]
Microsoft has released the Windows 10 KB5075912 extended security update to fix February 2026 Patch Tuesday vulnerabilities, including six zero-days, and continue rolling out replacements for expiring Secure Boot certificates. [...]
Microsoft has begun rolling out updated Secure Boot certificates through monthly Windows updates to replace the original 2011 certificates that will expire in late June 2026. [...]
The forensic tool's driver was signed with a digital certificate that expired years ago, but major security gaps allowed Windows to load it.
Microsoft has started rolling out new Secure Boot certificates that will automatically install on eligible Windows 11 24H2 and 25H2 systems. [...]
Microsoft has released the KB5073724 extended security update to fix the Patch Tuesday security updates, including 3 zero-days and a fix for expiring Secure Boot certificates. [...]
HP has pulled an HP OneAgent software update for Windows 11 that mistakenly deleted Microsoft certificates required for some organizations to log in to Microsoft Entra ID, effectively disconnecting them from their company's cloud environments. [...]
Microsoft says the October 2025 Windows security updates are causing smart card authentication and certificate issues due to a change designed to strengthen the Windows Cryptographic Services. [...]
Microsoft has revoked over 200 fraudulent code-signing certificates used in a ransomware campaign involving fake Teams installers by threat group Vanilla Tempest
Microsoft revoked more than 200 digital certificates that threat actors used to sign fake Teams binaries that set the stage for Rhysida ransomware attacks.
Microsoft on Thursday disclosed that it revoked more than 200 certificates used by a threat actor it tracks as Vanilla Tempest to fraudulently sign malicious binaries in ransomware attacks
Microsoft has disrupted a wave of Rhysida ransomware attacks in early October by revoking over 200 certificates used to sign malicious Teams installers. [...]
Cybersecurity researchers have shed light on a Chinese-speaking cybercrime group codenamed UAT-8099 that has been attributed to search engine optimization (SEO) fraud and theft of high-value credentials, configuration files, and certificate data. The attacks are designed to target Microsoft Internet Information Services (IIS) servers, with most of the infections reported in India, Thailand
Microsoft has resolved a known issue causing false CertificateServicesClient (CertEnroll) error messages after installing the July 2025 preview and subsequent Windows 11 24H2 updates. [...]
Microsoft has asked customers this week to disregard incorrect CertificateServicesClient (CertEnroll) errors that appear after installing the July 2025 preview update and subsequent Windows 11 24H2 updates. [...]