Excel Security
The latest Excel Security coverage — news, analysis, and updates from the WindowsNews.AI desk.
CVE-2025-59235: Critical Excel Memory Vulnerability Requires Immediate Patching
Microsoft has issued a high-priority security advisory for CVE-2025-59235, a serious out-of-bounds read vulnerability in Excel that could expose sensitive process memory when users open maliciously...
Excel CVE Analysis: Understanding Remote Delivery vs Local Execution Vulnerabilities
Microsoft's recent security advisory for CVE-2025-59231 has sparked confusion among security professionals and Excel users alike. The vulnerability, affecting Microsoft Excel, is described as a...
Microsoft Patches Critical Excel Heap Overflow (CVE-2025-54900) – What You Need to Know
Microsoft has released a security update patching a critical heap‑based buffer overflow in Excel, tracked as CVE‑2025‑54900, that could allow attackers to execute code on a victim’s machine...
Urgent Excel Security Fix: Use-After-Free Bug Opens Door to Code Execution — Mac LTSC Patches Delayed
Microsoft has issued a security advisory for CVE-2025-54903, a critical use-after-free vulnerability in Microsoft Excel that allows an attacker to execute code locally when a victim opens a...
Excel’s #BLOCKED Error Arrives as Microsoft Blocks External Links to Risky Files
Microsoft is rolling out a major security change for Excel that will see the spreadsheet application automatically block external links referencing file types deemed high-risk. Starting with Build...
Microsoft 365 to Block External Workbook Links by Default in 2025: Security Implications and Migration Strategies
For IT professionals, security administrators, and countless users across enterprises large and small, Microsoft 365 is a staple of daily productivity. Yet, for all its power, the platform’s very...
Microsoft Disables Excel External Links to Blocked File Types: What It Means for Windows Users
Excel will start blocking external workbook links to files considered dangerous by Microsoft’s Office Trust Center, a change that rolls out between October 2025 and July 2026. The move, signaled by...
Excel's Hidden Automation Hub: How to Enable the Developer Tab for Macros, VBA, and Office Scripts
Unlocking the full potential of Microsoft Excel requires venturing beyond basic formulas and pivot tables into the realm of automation—a journey that begins with a seemingly simple but crucial...
Critical Microsoft Excel Vulnerability (CVE-2025-30383) Exposes Millions to RCE Attacks
In the ever-escalating arms race of cybersecurity, a newly disclosed vulnerability in Microsoft Excel has sent shockwaves through the enterprise world, exposing millions of spreadsheets as potential...
Critical Excel Vulnerability CVE-2025-30379: RCE Exploit via Spreadsheets
In the digital trenches of modern cybersecurity, a new threat vector has emerged that weaponizes one of the business world's most ubiquitous tools: Microsoft Excel. Designated as CVE-2025-30379, this...
Excel April 2025 Update: AI, Python Integration, Security Enhancements, and Productivity Boosts
Overview of Excel's April 2025 Update Microsoft Excel has released a substantial update in April 2025 that brings transformative features geared towards enhancing productivity and security across...