Windows Server

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5065509 • MSRC update-guide entry Related CVEs: CVE-2025-54918 CVE-2025-55226 CVE-2025-53799 CVE-2025-53797 CVE-2025-53798 CVE-2025-54095 CVE-2025-54096 CVE-2025-54097  +12 more Affected components: Windows Server 2022 Microsoft summary: Improper authentication in Windows NTLM allows an authorized […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5070879 • MSRC update-guide entry Related CVEs: CVE-2025-59287 Affected components: Windows Server 2025 Microsoft summary: Deserialization of untrusted data in Windows Server Update Service allows an unauthorized attacker to execute code over […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5071542 • MSRC update-guide entry Related CVEs: CVE-2025-62454 CVE-2025-62456 CVE-2025-62457 CVE-2025-62466 CVE-2025-62470 CVE-2025-62472 CVE-2025-62473 CVE-2025-62549  +12 more Affected components: Windows Server 2022 Windows Server 2022, 23H2 Edition (Server Core installation) Microsoft summary: […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5087537 • MSRC update-guide entry Related CVEs: CVE-2026-35421 CVE-2026-41089 CVE-2026-32161 CVE-2026-40403 CVE-2026-21530 CVE-2026-33834 CVE-2026-34329 CVE-2026-34330  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Heap-based buffer overflow in Windows […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5050008 • MSRC update-guide entry Related CVEs: CVE-2025-21294 CVE-2025-21295 CVE-2025-21296 CVE-2025-21297 CVE-2025-21298 CVE-2025-21309 CVE-2025-21307 CVE-2024-49120  +12 more Affected components: Windows Server 2022 Windows Server 2022, 23H2 Edition (Server Core installation) Windows Server […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5078766 • MSRC update-guide entry Related CVEs: CVE-2026-23668 CVE-2026-23669 CVE-2026-23671 CVE-2026-23672 CVE-2026-23673 CVE-2026-24285 CVE-2026-24287 CVE-2026-24289  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Concurrent execution using shared resource […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5078738 • MSRC update-guide entry Related CVEs: CVE-2026-23674 Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Improper resolution of path equivalence in Windows MapUrlToZone allows an unauthorized attacker to bypass […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5063880 • MSRC update-guide entry Related CVEs: CVE-2025-50177 CVE-2025-53766 CVE-2025-53778 CVE-2025-49751 CVE-2025-49743 CVE-2025-49761 CVE-2025-49762 CVE-2025-50153  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Use after free in Windows […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5065432 • MSRC update-guide entry Related CVEs: CVE-2025-54918 CVE-2025-55226 CVE-2025-55236 CVE-2025-53799 CVE-2025-53800 CVE-2025-55224 CVE-2025-48807 CVE-2025-49734  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Improper authentication in Windows NTLM […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5089549 • MSRC update-guide entry Related CVEs: CVE-2026-35421 CVE-2026-32161 CVE-2026-40403 CVE-2026-21530 CVE-2026-33834 CVE-2026-34329 CVE-2026-34330 CVE-2026-34331  +12 more Affected components: Windows Server 2016 Microsoft summary: Heap-based buffer overflow in Windows GDI allows an […]