December 2025 Patch Tuesday: what Security and IT teams should prioritise
December 2025 Patch Tuesday is now available in the canonical BlackTree Patch Intelligence catalogue. The current bounded cohort covers Microsoft, Adobe and SAP. This is not a claim of unlimited vendor coverage.
The operational queue contains 86 approved patch records linked to 211 unique CVEs. BlackTree currently marks 9 records for an accelerated or out-of-band assessment. BlackTree urgency is separate from vendor severity, CVSS and EPSS.
Security teams should start with confirmed exploitation and exposed control-plane systems. IT administrators should then review applicability, prerequisites, restart impact, sequencing, known issues and rollback guidance on each patch detail page.
Most important Microsoft patches this month
The following fixes deserve early attention based on confirmed exploitation, public disclosure, attack path and technical impact. Applicability still depends on the products and roles deployed in each environment.
- CVE-2025-62221: Windows Cloud Files Mini Filter Driver Elevation of Privilege Vulnerability Microsoft marked exploitation as detected when the update shipped. This is most relevant after an attacker has already gained a foothold on a Windows system. Important, CVSS 7.8.
- CVE-2025-64671: GitHub Copilot for Jetbrains Remote Code Execution Vulnerability The issue was publicly disclosed before the update was released. Successful exploitation can run attacker-controlled code in the affected component. Important, CVSS 8.4.
- CVE-2025-54100: PowerShell Remote Code Execution Vulnerability The issue was publicly disclosed before the update was released. Successful exploitation can run attacker-controlled code in the affected component. Important, CVSS 7.8.
- CVE-2025-62554: Microsoft Office Remote Code Execution Vulnerability Successful exploitation can run attacker-controlled code in the affected component. Critical, CVSS 8.4.
Open the canonical December 2025 Patch Tuesday action queue on cve.blacktree.nl.
Patch details and exploitation assessments were checked against the Microsoft Security Update Guide release data for December 2025.
Editorial article generated from approved catalogue data. Recheck the canonical cycle for later vendor revisions or BlackTree corrections.
