Patch tracker / CVE reference / CVE-2025-53803
CVE-2025-53803
CVE-2025-53803 is a Microsoft vulnerability that Microsoft rates Important, with a CVSS score of 5.5 (Medium). Microsoft has shipped the fix: deploy one of the 12 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.
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Microsoft rates it Important. CVSS 5.5 (Medium). Fixed by 12 Microsoft security updates.
Risk summary
Not in the CISA KEV catalog. EPSS exploit probability <1%. CVSS 5.5 (Medium).
This CVE is among the top half of tracked Microsoft CVEs by EPSS exploit probability.
This kernel memory disclosure on Windows 10 Version 1809 and Windows Server 2019 shares the same High 8.8 rating and 19 percent EPSS as the imaging-component bug above, suggesting both landed in the same update with comparable risk. Kernel memory leaks are frequently paired with a separate exploit to defeat memory-protection mitigations, so this is worth tracking even without a confirmed KEV or ransomware entry. Bundle it with the other 19-percent-EPSS fixes in this cycle.
Do this: Patch alongside the imaging-component fix in the same maintenance window since both carry the same elevated EPSS.
AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.
Senserva AI Opinion and rich prompt for CVE-2025-53803
Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.
Official patch(es) for CVE-2025-53803
Lower priority: patch in your normal cycle. In Intune or Defender, confirm whether the fixing updates KB5065306, KB5065425, KB5065426, KB5065427, KB5065428, KB5065429, KB5065430, KB5065431, KB5065432, KB5065474, KB5065507, KB5065509 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.
Apply the Microsoft security updates below to fix CVE-2025-53803. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.
Scope and sources
- Affected products
- Windows 10 Version 1607 for 32-bit Systems
- Windows 10 Version 1607 for x64-based Systems
- Windows 10 Version 1809 for 32-bit Systems
- Windows 10 Version 1809 for x64-based Systems
- Windows 10 Version 21H2 for 32-bit Systems
- Windows 10 Version 21H2 for ARM64-based Systems
- Windows 10 Version 21H2 for x64-based Systems
- Windows 10 Version 22H2 for 32-bit Systems
- Windows 10 Version 22H2 for ARM64-based Systems
- Windows 10 Version 22H2 for x64-based Systems
- Windows 10 for 32-bit Systems
- Windows 10 for x64-based Systems
- Windows 11 Version 22H2 for ARM64-based Systems
- Windows 11 Version 22H2 for x64-based Systems
- Windows 11 Version 23H2 for ARM64-based Systems
- Windows 11 Version 23H2 for x64-based Systems
- Windows 11 Version 24H2 for ARM64-based Systems
- Windows 11 Version 24H2 for x64-based Systems
- Windows Server 2012
- Windows Server 2012 (Server Core installation)
- Windows Server 2012 R2
- Windows Server 2012 R2 (Server Core installation)
- Windows Server 2016
- Windows Server 2016 (Server Core installation)
- Windows Server 2019
- Windows Server 2019 (Server Core installation)
- Windows Server 2022
- Windows Server 2022 (Server Core installation)
- Windows Server 2022, 23H2 Edition (Server Core installation)
- Windows Server 2025
- Windows Server 2025 (Server Core installation)
- Fixed by the same updates
- Authoritative references
Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.