Cve 2026 55045
The latest Cve 2026 55045 coverage — news, analysis, and updates from the WindowsNews.AI desk.
Microsoft Patches Excel Heap Overflow (CVE-2026-55053)—Immediate Update Required
Microsoft's July 14, 2026 security update addresses CVE-2026-55053, a heap-based buffer overflow in Excel that can let attackers run code when a user opens a malicious workbook. The fix covers all supported versions, including Windows, Mac, and Office Online Server. Administrators and home users should verify the update is installed immediately, or use mitigations like Protected View until they can patch.
Patch Now: Microsoft Squashes Excel Memory Leak Vulnerability Across Windows, Mac, and Servers
Microsoft's July 14, 2026 security updates include a fix for CVE-2026-55122, a high-severity Excel vulnerability that can leak sensitive memory when a user opens a malicious file. The flaw affects nearly all Office versions on Windows, Mac, and Office Online Server. Administrators must deploy the updates and verify build numbers, as Windows Update alone may not cover all Office installations.
Microsoft Patches Excel Remote Code Flaw CVE-2026-55137—Here’s What You Need to Do Now
Microsoft’s July 14, 2026 security updates fix a heap-based buffer overflow in Excel (CVE-2026-55137) rated Important with a 7.8 CVSS score. A remote attacker can craft a malicious workbook that, when opened, runs arbitrary code with the user’s privileges. The article explains affected products, clarifies the “remote code execution” vs “local attack vector” distinction, and provides step-by-step patching instructions for home users, enterprises, and Mac owners.
Microsoft Word RCE Flaw Patched: Here’s How July’s Office Security Fix Keeps Attackers Out
Microsoft's July 14, 2026 Office security updates fix CVE-2026-55038, a stack-based buffer overflow in Word that can allow remote code execution when a user opens a malicious document. Rated Important with a CVSS 7.8 score, the flaw affects all supported Office versions, Mac editions, and SharePoint servers. While no active exploits are known, the patch is urgent because it closes multiple document-processing vulnerabilities in the same rollout; users and administrators should update immediately and verify build numbers.
Critical Word Double-Free Bug Leaves Millions of PCs and Servers Exposed—July 14 Patch Required
Microsoft's July 14, 2026 security update patches CVE-2026-55132, a high-severity double-free vulnerability in Word that allows remote attackers to execute code simply by convincing a user to open a malicious document. The flaw affects Microsoft 365, Office 2019/2021/2024, and SharePoint servers, and requires immediate patching to prevent full system compromise.
Critical Excel Remote Code Execution Flaw Fixed in Microsoft's July Patch Tuesday
On July 14, 2026, Microsoft released Office security updates that include a fix for CVE-2026-55058, a high-severity remote code execution vulnerability in Excel with a CVSS score of 7.8. The flaw affects nearly all supported Office versions and can be exploited by opening a malicious workbook, potentially allowing attackers to take control of a system. Users and administrators should apply the patch immediately and verify their Office installations are up to date.
Microsoft Fixes Excel Remote Code Execution Flaw (CVE-2026-55037): What You Need to Patch
Microsoft's July 2026 Office updates close CVE-2026-55037, a heap-based buffer overflow in Excel that enables remote code execution when a user opens a malicious workbook. The fix covers Excel 2016, Microsoft 365, Office 2019/2021/2024, and Office Online Server on Windows and Mac, with specific build numbers and the KB5002886 installer update for Excel 2016.
Microsoft Patches a Dangerous Word Code Execution Bug—Here’s How to Protect Your PC
Microsoft’s July 2026 Patch Tuesday delivers a critical fix for CVE-2026-55055, a stack-based buffer overflow in Word that allows code execution when a user opens a malicious document. The vulnerability affects all supported Office editions and several SharePoint server versions, carrying a CVSS 3.1 score of 7.8 with low attack complexity. Users and admins should apply the updates immediately and verify build numbers, as no workarounds exist.
KB5002886: Microsoft Patches CVE-2026-55044 Excel RCE Bug—How to Update
Microsoft's July 14, 2026 Patch Tuesday included a fix for CVE-2026-55044, a high-severity Excel remote code execution vulnerability that can be triggered by opening a malicious workbook. The flaw, which carries a 7.8 CVSS score, affects nearly all modern Office versions on Windows, Mac, and Office Online Server. While no active exploits have been detected, administrators and home users should update immediately by installing KB5002886 for Excel 2016, updating Click-to-Run channels, or moving to the specified secure builds for Mac and server editions.
Microsoft’s July 2026 Office Patch Seals a Heap Overflow That Could Hand Your PC to Attackers
Microsoft’s July 14, 2026 security updates patch CVE-2026-55129, a heap overflow in Office that enables remote code execution when a user opens a malicious file. The vulnerability affects Office 2016 through the latest Microsoft 365 apps on Windows and Mac. Despite an CVSS attack vector of “local,” attackers can deliver exploits via email or cloud files; the patch is critical, and defensive measures like Protected View and least privilege reduce risk until updates are applied.
Microsoft Pushes Critical Fix for Excel RCE Exploit in July's Office Security Patches
Microsoft's July 2026 Office updates patch CVE-2026-55036, a high-severity remote code execution vulnerability in Excel that affects all modern Office versions. Users must apply updates immediately to prevent system compromise via malicious spreadsheets. The patch covers Windows, Mac, and Office Online Server deployments.
Microsoft Patches Excel Zero-Day-Like Flaw—What CVE-2026-55141 Means for Your Spreadsheets
Microsoft has released a security patch for CVE-2026-55141, a high-severity vulnerability in Microsoft Excel that allows attackers to execute arbitrary code by tricking users into opening a malicious spreadsheet. The flaw affects all supported versions of Excel on Windows and macOS, and users are urged to apply the July 2026 update immediately to prevent potential compromise.
Microsoft’s July Patch Tuesday Closes Excel Remote Code Execution Flaw—Update Now
Microsoft's July 14, 2026 security updates fix CVE-2026-55136, a high-severity remote code execution vulnerability in Excel that requires a user to open a malicious workbook. The patch addresses an untrusted pointer dereference (CWE-822) and affects Microsoft 365 Apps, Excel 2016, Office 2019, Office LTSC, Office for Mac, and Office Online Server. No active exploits are known, but all users and administrators should apply the updates promptly and verify build numbers to prevent potential compromise.