Articles from February 2026
Browse all Windows news articles published in February 2026
CVE-2026-21244: Urgent Hyper-V RCE Patch and Defense Playbook
Microsoft has publicly registered CVE‑2026‑21244 as a serious Remote Code Execution (RCE) vulnerability in the Windows Hyper‑V stack, and administrators must treat it as an operational emergency: vend
CVE-2026-21245 Windows Kernel Elevation of Privilege Patch Guidance
Microsoft’s Security Update Guide records CVE‑2026‑21245 as a Windows kernel elevation‑of‑privilege issue — a classic local attack surface that can let a low‑privileged user or process gain SYSTEM rig
CVE-2026-21249: Windows NTLM Spoofing Urgency and Defender Steps
Microsoft’s advisory listing for CVE-2026-21249 confirms a new Windows NTLM spoofing vulnerability that has elevated operational urgency across enterprise environments: the vendor has assigned the ide
Patch Windows HTTP.sys Elevation of Privilege Now
Microsoft’s advisory listing for a Windows HTTP.sys elevation-of-privilege flaw should be treated as a high-priority remediation item: the vulnerability is recorded in vendor telemetry and public trac
CVE-2026-21251: Critical Windows Failover Cluster Vulnerability Explained
Microsoft’s Security Response Center has published an advisory entry for CVE‑2026‑21251 — labeled as a Cluster Client Failover (CCF) elevation‑of‑privilege issue — and paired it with a confidence rati
CVE-2026-21253: Critical Windows Mailslot EoP Vulnerability - Patch Analysis & Mitigation Guide
Microsoft has recorded CVE-2026-21253 — listed as a Mailslot File System Elevation of Privilege vulnerability — in its Security Update Guide, and at present the public vendor advisory provides only a
CVE-2023-2804: The 12-bit JPEG Heap Overflow Threat in Windows & How to Patch
A heap‑based buffer overflow in libjpeg‑turbo’s merged upsampling code — tracked as CVE‑2023‑2804 — remains a practical reminder that long‑tail, niche JPEG features can produce high‑impact crashes and
Critical Windows HTTP.sys Flaw CVE-2026-21250: Patch Analysis & Security Impact
Microsoft’s security guidance confirms a kernel‑mode flaw in the Windows HTTP protocol stack that can be abused for local or network‑proximal privilege escalation—an urgent remediation item for admini
CVE-2026-21255: Critical Hyper-V Security Bypass Vulnerability Demands Immediate Patching
Microsoft’s security advisory for CVE-2026-21255 confirms a Windows Hyper‑V vulnerability classed as a Security Feature Bypass and directs administrators to prioritize vendor-supplied updates; the pub
AI IDE Security Risks: How Copilot and Extensions Create New Attack Vectors
A Microsoft Security Response Center entry and several third‑party trackers that cover developer‑tool security describe a worrying pattern: AI‑driven editor integrations such as GitHub Copilot and Vis
CVE-2026-21511 Outlook Spoofing Vulnerability: Analysis & Protection Guide
Microsoft’s Security Update Guide has assigned the identifier CVE-2026-21511 to a Microsoft Outlook spoofing vulnerability, but public technical details remain sparse — a pattern we’ve seen before wit
CVE-2026-21257: Critical AI Security Flaw in GitHub Copilot & Visual Studio - Patch Now
Microsoft's security portfolio now includes a vendor-assigned advisory for CVE-2026-21257 — a vulnerability tied to GitHub Copilot and Visual Studio that vendors classify as an elevation-of-privilege