Windows Server

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5089549 • MSRC update-guide entry Related CVEs: CVE-2026-35421 CVE-2026-41096 CVE-2026-32161 CVE-2026-40403 CVE-2026-21530 CVE-2026-33834 CVE-2026-33839 CVE-2026-33841  +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 2022 📖 ~4 min read  •  Source: Microsoft KB5051979 • MSRC update-guide entry Related CVEs: CVE-2025-21376 CVE-2025-26634 CVE-2025-21351 CVE-2025-21352 CVE-2025-21368 CVE-2025-21369 CVE-2025-21375 CVE-2025-21391  +12 more Affected components: Windows Server 2022 Table of contents Symptom & Impact Environment & Reproduction Root […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5070886 • MSRC update-guide entry Related CVEs: CVE-2025-59287 Affected components: Windows Server 2022, 23H2 Edition (Server Core installation) Microsoft summary: Deserialization of untrusted data in Windows Server Update Service allows an unauthorized […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5065468 • 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 2016 Microsoft summary: Improper authentication in Windows NTLM allows an authorized […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5087420 • 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 […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5086096 • MSRC update-guide entry Related CVEs: CVE-2026-33116 Affected components: Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2025 Microsoft summary: Loop with unreachable exit condition ('infinite loop') in .NET.NET Framework, […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5077179 • MSRC update-guide entry Related CVEs: CVE-2025-2884 CVE-2026-21519 CVE-2026-21248 CVE-2026-21247 CVE-2026-21242 CVE-2026-21234 CVE-2026-21236 CVE-2026-21533  +12 more Affected components: Windows Server 2025 Microsoft summary: CVE-2025-2884 is regarding a vulnerability in TCG TPM2.0 […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5058500 • MSRC update-guide entry Related CVEs: CVE-2025-32710 CVE-2025-29966 CVE-2025-29967 CVE-2025-29833 CVE-2024-49128 CVE-2025-55229 CVE-2025-47955 CVE-2025-29959  +12 more Affected components: Windows Server 2022 Windows Server 2022, 23H2 Edition (Server Core installation) Microsoft summary: […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5077212 • MSRC update-guide entry Related CVEs: CVE-2026-21519 CVE-2026-21248 CVE-2026-21247 CVE-2026-21236 CVE-2026-21533 CVE-2026-21513 CVE-2026-21510 CVE-2026-21508  +11 more Affected components: Windows Server 2016 Microsoft summary: Access of resource using incompatible type ('type confusion') […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5087048 • 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 […]