Security Alerts
The latest Security Alerts coverage — news, analysis, and updates from the WindowsNews.AI desk.
Microsoft Flags Critical Visio Heap Overflow – Urgent Patch for CVE-2025-54907 Underway
Microsoft has confirmed a dangerous heap-based buffer overflow in Microsoft Office Visio that lets attackers execute malicious code simply by convincing a user to open a rigged diagram file. The...
Microsoft Patches Excel Code Execution Flaw CVE-2025-54904, but Mac LTSC Still Exposed
Administrators scrambling to lock down Microsoft Excel against a newly disclosed code execution vulnerability have hit a snag: the security updates for Office LTSC for Mac 2021 and 2024 are not yet...
CVE-2025-54905: Critical Microsoft Office Vulnerability Patched—Users Urged to Update Now
Microsoft has released a security patch for CVE-2025-54905, a dangerous untrusted pointer dereference vulnerability in Microsoft Office that could let attackers seize control of an unpatched system...
CVE-2025-54906: Microsoft Office Memory Bug Enables Code Execution via Malicious Docs – Patch Now
Microsoft has issued a security advisory for CVE-2025-54906, a critical memory-corruption vulnerability in Office that can lead to arbitrary code execution when a user opens or previews a specially...
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...
CVE-2025-54902: Excel Out-of-Bounds Read Flaw Could Let Attackers Seize PCs—Mac Updates Still Missing
Microsoft has released a security update for a critical out-of-bounds read vulnerability in Excel that could allow remote code execution—but the patch is not yet available for Mac users. Tracked as...
CVE-2025-54899 Exposes Excel to Code Execution Attacks: Patch Deployed for Critical Memory-Safety Bug
Microsoft has released a security update to patch CVE-2025-54899, a memory-safety vulnerability in Excel that can allow attackers to execute arbitrary code on a victim's machine when a malicious...
Microsoft Patches Excel Vulnerability CVE-2025-54898: Out-of-Bounds Read Could Allow Code Execution
Microsoft has issued a security update for CVE-2025-54898, an out-of-bounds read vulnerability in Microsoft Excel that could be exploited by attackers to achieve local code execution when a user...
Unauthenticated RCE Exploits Hit On-Prem SharePoint — Patch, Rotate Keys, and Hunt Now
Microsoft’s on-premises SharePoint servers are under active attack from a chain of vulnerabilities that grant unauthenticated attackers remote code execution (RCE). The exploit combines an...
Microsoft Warns of Actively Targeted Excel Use-After-Free Flaw CVE-2025-54896
Microsoft has issued a critical security advisory for CVE-2025-54896, a use-after-free vulnerability in Microsoft Office Excel that could allow attackers to execute arbitrary code on Windows...
Windows NEGOEX Integer Overflow Lets Attackers Escalate to SYSTEM—Patch Now
Microsoft has released a security update to plug a critical elevation-of-privilege hole in the Windows NEGOEX authentication mechanism. Tracked as CVE-2025-54895, the flaw stems from an integer...
Microsoft Patches Use-After-Free in Windows XAML DatePickerFlyout That Could Elevate Local Privileges
Microsoft has assigned CVE-2025-54111 to a use‑after‑free vulnerability in the Windows UI XAML Phone DatePickerFlyout control, warning that an authenticated local attacker could exploit the flaw...