endpoint security

CVE-2025-54109 Windows Defender Firewall Service Elevation of Privilege Vulnerability Summary What it is: CVE-2025-54109 is an elevation-of-privilege (EoP) vulnerability described by Microsoft as "Access of resource using incompatible type ('type confusion')" in the Windows Defender Firewall...

Microsoft’s Security Response Guide lists CVE-2025-54112 as a vulnerability in the Microsoft Virtual Hard Disk (VHD/VHDX) handling code that can be abused by an authorized local attacker to achieve elevation of privilege on Windows hosts, a condition vendors and incident responders classify as...

Microsoft’s Security Update Guide lists CVE-2025-53808 as an Elevation of Privilege vulnerability in the Windows Defender Firewall Service that stems from an “access of resource using incompatible type” (commonly called type confusion), and the vendor warns that a locally authorized attacker...

Below is a long-form, operationally focused feature article about the vulnerability you cited. It summarizes what is known, flags what I could not independently corroborate, cross‑references multiple vendor sources, and gives prioritized, actionable remediation, detection, and incident‑response...

Note: below is a long-form, technically focused feature article about CVE-2025-53804. I drew on Microsoft’s official entry for this CVE and on Microsoft documentation and guidance about kernel-mode drivers and driver blocklists to explain the risk, likely exploitation paths, detection and...

Microsoft has published an advisory identifying CVE-2025-55317, a local elevation-of-privilege flaw in Microsoft AutoUpdate (MAU) caused by improper link resolution before file access — commonly described as a link-following or symlink/junction weakness — that can allow an authorized local...

Microsoft has published an advisory for CVE-2025-54903, a use‑after‑free vulnerability in Microsoft Excel that can lead to local code execution when a victim opens a specially crafted spreadsheet — a document‑based remote code execution (RCE) risk that should be treated as high priority for both...

A newly disclosed Microsoft Excel vulnerability tracked as CVE-2025-54902 is an out‑of‑bounds read flaw in Excel’s file‑parsing logic that Microsoft warns could allow an attacker to achieve code execution on a targeted machine when a user opens a specially crafted spreadsheet, and organizations...

Microsoft has published an advisory for CVE-2025-54896: a use-after-free vulnerability in Microsoft Office Excel that, when exploited via a specially crafted workbook, can lead to code execution in the context of the user who opens the file. This class of bug is a recurring and high-consequence...

Microsoft’s advisory for CVE-2025-54895 warns that an integer overflow or wraparound in the SPNEGO Extended Negotiation (NEGOEX) security mechanism can be triggered by an authorized local actor to elevate privileges, turning a legitimate local account into a pathway to SYSTEM-level control if...

A use‑after‑free vulnerability in the Windows Connected Devices Platform Service (CDPSvc) has been cataloged by Microsoft as an elevation‑of‑privilege issue that can let an authorized, local attacker escalate to SYSTEM, and administrators should treat it as a high‑priority patching item while...

Microsoft’s “new Outlook” for Windows has finally closed one of its most glaring gaps with the classic client: you can now access certain email attachments while offline, alongside a handful of usability fixes — from adding multiple recipients to replies to restoring the familiar Ctrl+F “find”...

Since March 2025, threat actors have increasingly weaponized ConnectWise ScreenConnect installers — using trojanized, stripped-down ClickOnce runners and other delivery tricks to convert a trusted remote administration tool into a stealthy initial-access vector that drops multiple RATs and...

KMSpico is a widely mentioned but legally fraught program: it emulates Microsoft’s Key Management Service (KMS) to make Windows and Office think they are legitimately volume‑activated, and while that promises “free activation” it carries clear legal, security, and operational downsides that make...

Microsoft has acknowledged a compatibility regression introduced by the August 12, 2025 cumulative Windows updates that can cause unexpected User Account Control (UAC) elevation prompts and MSI Error 1730 failures for non‑administrator users when applications trigger Windows Installer (MSI)...

Microsoft’s decision to stop issuing free security updates for Windows 10 on 14 October 2025 has forced IT leaders into a binary choice: pay to buy time, or accelerate an estate-wide migration to Windows 11 — and the short-term cost of staying on Windows 10 could be measured in billions for...

August’s security headlines were dominated by a clutch of high-impact flaws — from archive utilities and consumer networking gear to enterprise-grade management consoles and cloud AI services — that together made rapid triage and patching unavoidable for defenders. Background The August 2025...

A growing number of administrators are reporting a perplexing problem: virtualized Windows Server instances running the Remote Desktop Server role suddenly become unresponsive for Remote Desktop users at a consistent time of day—sessions appear attached but the remote desktop shows a black...

With the clock ticking toward Windows 10’s end of support on October 14, 2025, organisations that still treat migration as a planning exercise run a growing risk of being forced into costly, disruptive decisions at the worst possible moment; moving now from planning to implementation secures...

Microsoft Teams is rolling out two platform-level protections meant to stop weaponized files and scammy links from arriving in users’ chats and channels, a change that shifts the battleground for collaboration security from reactive investigation to proactive blocking. Background Microsoft’s...