Excel Security
The latest Excel Security coverage — news, analysis, and updates from the WindowsNews.AI desk.
Excel Patch CVE-2026-55048: Don’t Be Fooled by the ‘Local’ Label—Here’s Why You Need to Update Now
Microsoft’s July 2026 security updates include a fix for an Excel vulnerability that seems, at first glance, less dangerous than its title suggests. The flaw, tracked as CVE-2026-55048, is...
CVE-2026-44822: Why This Excel Information Disclosure Flaw Demands Immediate Office Updates
Microsoft has officially listed CVE-2026-44822 in its Security Update Guide, identifying a high-impact information disclosure vulnerability in Microsoft Excel. The advisory, while currently light on...
Excel RCE CVE-2026-45469: Why Local Attack Vector Demands Urgent Patching
Microsoft has assigned CVE-2026-45469 to a newly disclosed remote code execution (RCE) vulnerability in Microsoft Excel. The flaw carries a CVSS attack vector of Local (AV:L), meaning exploitation...
CVE-2026-40362: Patch Excel RCE flaw now before exploits surface
Microsoft’s Security Update Guide now lists CVE-2026-40362, a remote code execution (RCE) vulnerability in Microsoft Excel, with the company expressing high confidence in its existence and...
Patch Critical CVE-2026-40359 Excel RCE Flaw Now to Block Attacks
Microsoft has officially disclosed CVE-2026-40359, a remote code execution (RCE) vulnerability in Microsoft Excel, in its Security Update Guide. The listing marks it as an Office-family patching...
CVE-2026-40360: Microsoft Excel Information Disclosure Vulnerability Patched – Enterprise Checklist for May 2026 Patch Tuesday
Microsoft’s May 2026 Patch Tuesday rollout includes a fix for CVE-2026-40360, an information disclosure vulnerability in Microsoft Excel that could allow remote attackers to read sensitive data...
Copilot-Driven Excel XSS in CVE-2026-26144 Lets Attackers Steal Data Without Clicks
Microsoft's March Patch Tuesday revealed a critical vulnerability that exposes how deeply integrated AI assistants can amplify traditional software flaws. CVE-2026-26144, a cross-site scripting (XSS)...
CVE-2026-26108: Excel Heap Overflow Vulnerability Patched in March 2026 Security Update
Microsoft's March 2026 Patch Tuesday security release addressed a critical vulnerability in Microsoft Excel tracked as CVE-2026-26108, a heap-based buffer overflow that could allow remote code...
Microsoft Excel CVE-2026-26107: Remote Execution Claim Contradicts Local Attack Vector in CVSS Scoring
Microsoft's security advisory for CVE-2026-26107 describes a \"Microsoft Excel Remote Code Execution Vulnerability,\" but the published CVSS 3.1 vector tells a different story:...
Excel CVE-2026-26144 XSS Vulnerability Enables Copilot Data Exfiltration in Zero-Click Attack
Microsoft's March 2026 Patch Tuesday addressed a critical Excel vulnerability that creates a dangerous new attack vector for AI-powered data theft. CVE-2026-26144, a cross-site scripting flaw in...
CVE-2026-21259: Critical Excel Heap Overflow Vulnerability Demands Immediate Action
Microsoft has disclosed a critical security vulnerability in Excel that could allow attackers to execute arbitrary code on affected systems. CVE-2026-21259, a heap-based buffer overflow in Microsoft...
Excel CVE-2026-20950: Why a 'Remote' RCE Has a 'Local' CVSS Score
Microsoft's recent security advisory for CVE-2026-20950 has created confusion among security professionals and Excel users alike. The vulnerability is clearly labeled as a "Remote Code Execution"...