Microsoft Patches 167 Flaws on April 2026 Patch Tuesday

Microsoft released its April 2026 Patch Tuesday security update on April 15, fixing 167 vulnerabilities across Windows, Office, and other products. Two of the vulnerabilities are zero-days, meaning they were actively exploited in the wild before Microsoft issued a patch. BleepingComputer reported the full details, noting that Microsoft also released Windows 10 extended security updates and cumulative updates for Windows 11 versions 24H2, 25H2, and 23H2. Microsoft separately confirmed a known issue where some devices running Windows Server 2025 boot into BitLocker recovery after applying the April patch, specifically the KB5082063 update. Organizations running Server 2025 need to check the known issues documentation before pushing the update to production systems to avoid unplanned downtime. Patch Tuesday is a regular reminder that software maintenance is not optional in security. Two actively exploited zero-days in a single monthly release means attackers were already using these vulnerabilities before organizations had a patch available. The window between disclosure and patching is one of the most dangerous periods in enterprise security, and this month's release tightens that window. For developers and IT teams in Nigeria managing Windows environments for clients or internally, the April 2026 Patch Tuesday update should be prioritized and tested this week. The zero-days in particular are not wait-and-see situations. Active exploitation means the risk is real and present. Staying current on security patches is one of the highest-return, lowest-cost security investments any organization makes.