windows security

Avira’s antivirus offerings have vaulted back into the conversation as a top-tier option for Windows users — but the story is more nuanced than a single headline. Recent reporting tied to a Consumer Reports roundup prompted renewed interest in Avira Free Security and Avira Antivirus Pro, and...

Microsoft is rolling out a coordinated refresh of the Secure Boot certificates that have anchored Windows boot security since 2011, and if you run Windows on older hardware you should treat this as a time‑sensitive maintenance event: new 2023 certificate authorities will be injected through...

Microsoft’s plan to make Windows “secure by default” hinges on two tightly coupled ideas: a default-deny runtime integrity posture called Windows Baseline Security Mode (BSM), and a system-wide User Transparency and Consent (UTC) model that surfaces mobile-style permission prompts and auditable...

IT administrators now have practical, fleet-scale ways to check whether Windows devices are carrying the updated Secure Boot certificate chain and whether they’re ready to accept the upcoming Secure Boot updates — a crucial capability as Microsoft and OEMs rotate the platform’s cryptographic...

CISA’s catalog has just expanded again, and this time the additions hit the Windows stack: six Microsoft vulnerabilities — spanning Windows Shell, MSHTML, Office Word, Desktop Window Manager, Remote Access Connection Manager, and Remote Desktop Services — were added to the Known Exploited...

Microsoft’s long-neglected desktop has, shockingly to some and unsurprisingly to others, begun to show signs of life: the company that many argued had turned Windows into a legacy cash cow amid an AI-and-cloud renaissance is now publicly re-prioritizing the platform, reorganizing leadership, and...

Microsoft’s security tracker lists CVE-2026-20846 as a denial‑of‑service vulnerability in the Microsoft Graphics Component (GDI+); the advisory is terse on exploit mechanics but clear that malformed graphics input handled by GDI+ can crash or destabilize affected processes, making...

Microsoft’s tracking entry for CVE-2026-21237 lists a new Windows Subsystem for Linux (WSL) elevation-of-privilege issue that every Windows administrator and security team should treat as a priority for triage—even if the public technical detail set is intentionally sparse at the moment...

Microsoft’s security telemetry and vendor advisories have confirmed a high‑impact vulnerability in the Windows kernel HTTP protocol stack: an elevation‑of‑privilege issue affecting the HTTP.sys driver. Administrators should treat this as an urgent remediation item for any hosts that bind...

Microsoft’s public advisory entry for CVE-2026-21241 records a new elevation-of-privilege issue tied to the Windows Ancillary Function Driver for WinSock (AFD, afd.sys), but technical detail in the advisory is intentionally sparse; defenders must therefore treat the vendor’s update mapping as...

Microsoft’s public record for CVE-2026-21239 identifies a kernel-level elevation of privilege in Windows and pairs that entry with Microsoft’s new “confidence” indicator — a vendor signal that shapes how defenders should triage, patch, and hunt for this class of risk. The entry is short on...

Microsoft’s security feed now lists CVE-2026-21243 as a vulnerability in the Windows Lightweight Directory Access Protocol (LDAP) that can be leveraged to cause a denial-of-service condition against Windows systems, and the advisory emphasizes uncertainty around the detailed technical root cause...

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 rights — and the vendor’s terse advisory pairs the entry with its confidence/technical‑detail...

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 identifier and published a terse entry in its Security Update Guide, but technical specifics and KB...

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 trackers, it affects the kernel-mode HTTP protocol stack that terminates HTTP requests for IIS and...

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 rating that deserves immediate attention from Windows administrators, security teams, and anyone who...

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 terse confirmation of the issue rather than a deep technical breakdown; defenders must therefore...

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 administrators that host HTTP.sys‑backed services. (msrc.microsoft.com) Background HTTP.sys is the...

Microsoft's advisory entry for CVE-2026-21525 confirms a denial‑of‑service weakness in the Windows Remote Access Connection Manager (RasMan) that can be triggered by a local, authorized actor manipulating file system links — a technical detail that shifts this bug from a generic service crash to...

Microsoft has cataloged CVE‑2026‑21510 as a Windows Shell — Security Feature Bypass entry in its Security Update Guide, but the public record is deliberately terse: Microsoft’s advisory confirms the vulnerability and attaches its internal report‑confidence signal to indicate the degree of...