{"id":1207,"date":"2026-02-10T22:04:44","date_gmt":"2026-02-10T22:04:44","guid":{"rendered":"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/10\/patch-tuesday-february-2026-edition\/"},"modified":"2026-02-10T22:04:44","modified_gmt":"2026-02-10T22:04:44","slug":"patch-tuesday-february-2026-edition","status":"publish","type":"post","link":"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/10\/patch-tuesday-february-2026-edition\/","title":{"rendered":"Patch Tuesday, February 2026 Edition"},"content":{"rendered":"
\n

Microsoft<\/strong> today released updates to fix more than 50 security holes in its Windows<\/strong> operating systems and other software, including patches for a whopping six \u201czero-day\u201d vulnerabilities that attackers are already exploiting in the wild.<\/p>\n

\"\"<\/p>\n

Zero-day #1 this month is CVE-2026-21510<\/a>, a security feature bypass vulnerability in Windows Shell<\/strong> wherein a single click on a malicious link can quietly bypass Windows protections and run attacker-controlled content without warning or consent dialogs. CVE-2026-21510 affects all currently supported versions of Windows.<\/p>\n

The zero-day flaw\u00a0CVE-2026-21513<\/a> is a\u00a0security bypass bug targeting MSHTML<\/strong>, the proprietary engine of the default Web browser in Windows. CVE-2026-21514<\/a> is a related security feature bypass in Microsoft Word.<\/strong><\/p>\n

The zero-day CVE-2026-21533<\/a> allows local attackers to elevate their user privileges to \u201cSYSTEM\u201d level access in Windows Remote Desktop Services<\/strong>. CVE-2026-21519<\/a> is a zero-day elevation of privilege flaw in the Desktop Window Manager<\/strong> (DWM), a key component of Windows that organizes windows on a user\u2019s screen. Microsoft fixed a different zero-day in DWM just last month<\/a>.<\/p>\n

The sixth zero-day is CVE-2026-21525<\/a>, a potentially disruptive denial-of-service vulnerability in the Windows Remote Access Connection Manager<\/strong>, the service responsible for maintaining VPN connections to corporate networks.<\/span><\/p>\n

Chris Goettl<\/strong> at Ivanti<\/strong> reminds us Microsoft has issued several out-of-band security updates since January\u2019s Patch Tuesday. On January 17, Microsoft pushed a fix that resolved a credential prompt failure when attempting remote desktop or remote application connections. On January 26, Microsoft patched a zero-day security feature bypass vulnerability (CVE-2026-21509<\/a>) in Microsoft Office<\/strong>.<\/p>\n

Kev Breen<\/strong> at Immersive<\/strong> notes that this month\u2019s Patch Tuesday includes several fixes for remote code execution vulnerabilities affecting GitHub Copilot<\/strong> and multiple integrated development environments (IDEs), including VS Code<\/strong>, Visual Studio<\/strong>, and JetBrains<\/strong> products. The relevant CVEs are CVE-2026-21516<\/a>, CVE-2026-21523<\/a>, and CVE-2026-21256<\/a>.<\/p>\n

Breen said the AI vulnerabilities Microsoft patched this month stem from a command injection flaw that can be triggered through prompt injection, or tricking the AI agent into doing something it shouldn\u2019t \u2014 like executing malicious code or commands.<\/p>\n

\u201cDevelopers are high-value targets for threat actors, as they often have access to sensitive data such as API keys and secrets that function as keys to critical infrastructure, including privileged AWS or Azure API keys,\u201d Breen said. \u201cWhen organizations enable developers and automation pipelines to use LLMs and agentic AI, a malicious prompt can have significant impact. This does not mean organizations should stop using AI. It does mean developers should understand the risks, teams should clearly identify which systems and workflows have access to AI agents, and least-privilege principles should be applied to limit the blast radius if developer secrets are compromised.\u201d<\/p>\n

The\u00a0SANS Internet Storm Center<\/strong>\u00a0has a\u00a0clickable breakdown<\/a> of each individual fix this month from Microsoft, indexed by severity and CVSS score. Enterprise Windows admins involved in testing patches before rolling them out should keep an eye on askwoody.com<\/a>, which often has the skinny on wonky updates. Please don\u2019t neglect to back up your data if it has been a while since you\u2019ve done that, and feel free to sound off in the comments if you experience problems installing any of these fixes.<\/p>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Microsoft today released updates to fix more than 50 security holes in its Windows operating systems and other software, including patches for a whopping six \u201czero-day\u201d vulnerabilities that attackers are already exploiting in the wild. Zero-day #1 this month is CVE-2026-21510, a security feature bypass vulnerability in Windows Shell wherein a single click on a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-container-style":"default","site-container-layout":"default","site-sidebar-layout":"default","disable-article-header":"default","disable-site-header":"default","disable-site-footer":"default","disable-content-area-spacing":"default","footnotes":""},"categories":[440,608,609,610,611,612,613,614,615,616,617,90,449,192,450,193,143,618,619,620,607,177,621,622],"tags":[91],"class_list":["post-1207","post","type-post","status-publish","format-standard","hentry","category-chris-goettl","category-cve-2026-21256","category-cve-2026-21509","category-cve-2026-21510","category-cve-2026-21513","category-cve-2026-21514","category-cve-2026-21516","category-cve-2026-21519","category-cve-2026-21523","category-cve-2026-21525","category-cve-2026-21533","category-cybersecurity","category-desktop-window-manager","category-immersive","category-ivanti","category-kev-breen","category-latest-warnings","category-microsoft-word","category-mshtml","category-sans-internet-storm-center","category-security-tools","category-time-to-patch","category-windows-remote-desktop-services","category-windows-shell","tag-cybersecurity"],"yoast_head":"\nPatch Tuesday, February 2026 Edition - Imperative Business Ventures Limited<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.ibvl.in\/index.php\/2026\/02\/10\/patch-tuesday-february-2026-edition\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Patch Tuesday, February 2026 Edition - Imperative Business Ventures Limited\" \/>\n<meta property=\"og:description\" content=\"Microsoft today released updates to fix more than 50 security holes in its Windows operating systems and other software, including patches for a whopping six \u201czero-day\u201d vulnerabilities that attackers are already exploiting in the wild. 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