Office Security
The latest Office Security coverage — news, analysis, and updates from the WindowsNews.AI desk.
Microsoft Word Flaw CVE-2026-40421: Why It’s More Dangerous Than It Looks and How to Fix It
On May 12, 2026, Microsoft disclosed a new information disclosure vulnerability in Word, tracked as CVE-2026-40421, that could allow attackers to read sensitive data from documents. The company has...
CVE-2026-40366: No-Click Word RCE via Preview Pane—Patch Now
Microsoft’s May 12, 2026 security update addresses CVE-2026-40366, a Critical remote code execution (RCE) vulnerability in Microsoft Word. The flaw, rated Critical, stems from a use-after-free bug...
Critical Office RCE Bug: Patch CVE-2026-40363 Zero-Click Preview Flaw Now
Microsoft has released an emergency security update addressing CVE-2026-40363, a critical remote code execution (RCE) vulnerability in Microsoft Office that can be triggered through the Outlook...
CVE-2026-33822: Microsoft Word Information Disclosure Vulnerability Analysis
Microsoft has documented CVE-2026-33822 as a Microsoft Word information disclosure vulnerability, though the company's confidence metadata reveals more nuance than the standard CVE label suggests....
Microsoft Office 2026 CVEs 26110 & 26113: Critical Preview Pane RCE Patches Released
Microsoft has released security patches for two critical vulnerabilities in Microsoft Office 2026 that enable remote code execution through the preview pane. CVE-2026-26110 and CVE-2026-26113,...
Microsoft Office Critical Patches: CVE-2026-26110 and CVE-2026-26113 Require Immediate Attention
Microsoft has released emergency security updates addressing two critical vulnerabilities in Microsoft Office tracked as CVE-2026-26110 and CVE-2026-26113. Both flaws carry CVSS scores of 9.8 out of...
Microsoft Office CVE-2026-26110: Remote Code Execution Vulnerability with Local Attack Vector Explained
Microsoft's security advisory for CVE-2026-26110 presents a confusing picture: a Remote Code Execution vulnerability in Microsoft Office with a CVSS Attack Vector listed as Local (AV:L). This...
CVE-2026-26113: Microsoft Office RCE Vulnerability with Local Attack Vector Explained
Microsoft's security advisory for CVE-2026-26113 describes a "Microsoft Office Remote Code Execution Vulnerability" with a CVSS vector that lists the Attack Vector (AV) as Local (L), creating...
Microsoft Patches Excel Information-Disclosure Bug: Why It’s More Dangerous Than It Sounds
Microsoft’s first 2026 security update fixes an Excel vulnerability that attackers could exploit to read sensitive data from a computer’s memory. The flaw, tracked as CVE-2026-21258, was...
Microsoft Patches Critical Office Vulnerability CVE-2026-20955 That Allows Remote Code Execution via Malicious Files
Microsoft has quietly patched a severe vulnerability in Microsoft Office that could allow attackers to execute malicious code on your PC just by getting you to open a specially crafted document. The...
Microsoft's Excel Fix for CVE-2026-20955: The RCE Flaw That Isn't Network-Based
Microsoft has released a patch for a critical Excel vulnerability that can let attackers run code on your PC—but the severity label is causing head-scratching among security teams. While the...
RCE vs CVSS AV: Decoding Microsoft Office Vulnerabilities and Real-World Security Implications
The cybersecurity landscape is filled with technical terminology that often creates confusion between security professionals and end-users, particularly when it comes to vulnerability scoring and...