Windows Server

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5050049 • MSRC update-guide entry Related CVEs: CVE-2025-21294 CVE-2025-21295 CVE-2025-21296 CVE-2025-21297 CVE-2025-21298 CVE-2025-21307 CVE-2025-21411 CVE-2025-21413  +12 more Affected components: Windows Server 2016 Windows Server 2016 (Server Core installation) Table of contents Symptom […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5055521 • MSRC update-guide entry Related CVEs: CVE-2025-26663 CVE-2025-26686 CVE-2025-26670 CVE-2025-27480 CVE-2025-27482 CVE-2025-27491 CVE-2023-40547 CVE-2025-26664  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Use after free in Windows […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5093446 • MSRC update-guide entry Related CVEs: CVE-2026-32177 CVE-2026-35433 Affected components: Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 Microsoft summary: Heap-based buffer overflow in .NET allows an unauthorized attacker […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5064010 • MSRC update-guide entry Related CVEs: CVE-2025-50176 CVE-2025-50177 CVE-2025-53766 CVE-2025-53778 CVE-2025-49751 CVE-2025-49743 CVE-2025-49761 CVE-2025-49762  +12 more Affected components: Windows Server 2022, 23H2 Edition (Server Core installation) Windows Server 2022 Microsoft summary: […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5061195 • MSRC update-guide entry Related CVEs: CVE-2025-32709 Affected components: Windows Server 2025 Microsoft summary: Null pointer dereference in Windows Ancillary Function Driver for WinSock allows an authorized attacker to elevate privileges […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5046696 • MSRC update-guide entry Related CVEs: CVE-2024-43625 CVE-2024-43639 CVE-2024-43623 CVE-2024-43626 CVE-2024-43627 CVE-2024-43628 CVE-2024-43630 CVE-2024-43634  +12 more Affected components: Windows Server 2025 Table of contents Symptom & Impact Environment & Reproduction Root […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5049981 • MSRC update-guide entry Related CVEs: CVE-2025-21294 CVE-2025-21295 CVE-2025-21296 CVE-2025-21298 CVE-2025-21307 CVE-2025-21411 CVE-2025-21413 CVE-2025-21210  +12 more Affected components: Windows Server 2025 Table of contents Symptom & Impact Environment & Reproduction Root […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5075943 • MSRC update-guide entry Related CVEs: CVE-2026-21519 CVE-2026-21248 CVE-2026-21247 CVE-2026-21235 CVE-2026-21234 CVE-2026-21236 CVE-2026-21533 CVE-2026-21513  +12 more Affected components: Windows Server 2019 (Server Core installation) Microsoft summary: Access of resource using incompatible […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5058387 • MSRC update-guide entry Related CVEs: CVE-2025-29966 CVE-2025-29967 CVE-2025-29833 CVE-2025-55229 CVE-2025-47955 CVE-2025-29959 CVE-2025-29960 CVE-2025-29969  +12 more Affected components: Windows Server 2016 Microsoft summary: Heap-based buffer overflow in Windows Remote Desktop allows […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5075970 • MSRC update-guide entry Related CVEs: CVE-2026-21236 CVE-2026-21533 CVE-2026-21513 CVE-2026-21510 CVE-2026-21508 CVE-2026-21253 CVE-2026-21249 CVE-2026-21239  +6 more Affected components: Windows Server 2025 Microsoft summary: Heap-based buffer overflow in Windows Ancillary Function Driver […]