Windows Server

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2019 📖 ~4 min read  •  Source: Microsoft KB5065510 • 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 2019 (Server Core installation) Microsoft summary: Improper authentication in Windows NTLM […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2025 📖 ~4 min read  •  Source: Microsoft KB5065428 • 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 2025 Microsoft summary: Improper authentication in Windows NTLM allows an authorized […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5048652 • MSRC update-guide entry Related CVEs: CVE-2024-49105 CVE-2024-49122 CVE-2024-49123 CVE-2024-49124 CVE-2024-49126 CVE-2024-49132 CVE-2024-49112 CVE-2024-49118  +12 more Affected components: Windows Server 2022 Windows Server 2022, 23H2 Edition (Server Core installation) Table of […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5053995 • MSRC update-guide entry Related CVEs: CVE-2025-24035 CVE-2025-24064 CVE-2025-26645 CVE-2024-9157 CVE-2025-24987 CVE-2025-24988 CVE-2025-21180 CVE-2025-21247  +10 more Affected components: Windows Server 2022 Microsoft summary: Sensitive data storage in improperly locked memory in […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2016 📖 ~4 min read  •  Source: Microsoft KB5046630 • MSRC update-guide entry Related CVEs: CVE-2024-43451 Affected components: Windows Server 2016 Table of contents Symptom & Impact Environment & Reproduction Root Cause Analysis Quick Triage Step-by-Step Diagnosis Solution – Primary […]

🟠 High   ⏱ 15–60 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5050188 • MSRC update-guide entry Related CVEs: CVE-2025-21176 Affected components: Microsoft .NET Framework 3.5 AND 4.8.1 on Windows Server 2022, 23H2 Edition (Server Core installation) Table of contents Symptom & Impact Environment […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5034770 • MSRC update-guide entry Related CVEs: CVE-2024-20684 CVE-2024-21357 CVE-2024-21338 CVE-2024-21340 CVE-2024-21349 CVE-2024-21350 CVE-2024-21352 CVE-2024-21354  +12 more Affected components: Windows Server 2022, 23H2 Edition (Server Core installation) Windows Server 2022 Table of […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5040434 • MSRC update-guide entry Related CVEs: CVE-2024-38060 CVE-2024-38077 CVE-2024-38074 CVE-2024-38076 CVE-2024-38184 CVE-2024-38191 CVE-2024-38185 CVE-2024-38186  +12 more Affected components: Windows Server 2022 Windows Server 2022, 23H2 Edition (Server Core installation) Microsoft .NET […]

🔴 Critical   ⏱ 15–90 min  Last verified: 25 May 2026 Affected versions: Windows Server 2022 📖 ~4 min read  •  Source: Microsoft KB5070882 • 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 2025 📖 ~4 min read  •  Source: Microsoft KB5049993 • 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 2025 Table of contents Symptom & Impact Environment & Reproduction Root […]