Cve 2026 54987
The latest Cve 2026 54987 coverage — news, analysis, and updates from the WindowsNews.AI desk.
Windows DHCP Client Flaw Earns 7.5 CVSS Score, Patched Across Six Server Generations
Microsoft’s July 2026 Patch Tuesday includes CVE-2026-49181, a high-severity DHCP Client elevation-of-privilege flaw that is network-exploitable without user interaction. It affects all supported Windows Server releases and two Windows 10 long-term servicing branches, but not Windows 11. Administrators should deploy the update quickly and verify build numbers, as the attack prerequisites are favorable to adversaries despite no observed in-the-wild exploitation.
Windows Clipboard Flaw Can Turn Limited Access Into Full System Control—Patch Now
Microsoft's July 2026 Patch Tuesday includes a fix for CVE-2026-49183, a high-severity Windows Clipboard Server vulnerability that could let a locally authenticated attacker with low privileges escalate to full system control. The race condition flaw affects most supported Windows 10, 11, and Server versions and requires immediate patching, especially on shared or user-accessible machines. While not yet exploited in the wild, the bug's potential for post-compromise abuse makes it a critical update for all organizations.
Windows 11 July Patch KB5101650 Seals UPnP Library from Local File Abuse
Microsoft’s July 2026 update patches CVE-2026-49180, a link-resolution flaw in the Windows UPnP library that could let local attackers tamper with files. The bug affects all supported Windows versions, including Server Core, and is fixed via cumulative updates with KB5101650 for Windows 11 24H2/25H2. Although Microsoft labels it an information-disclosure issue, the CVSS vector suggests high integrity impact, so admins should treat it as potentially allowing file modification and deploy the patch broadly.
Patch Your Domain Controllers Now: Microsoft Fixes Active Directory RCE That Can Hijack Entire Networks
Microsoft has released a critical patch for CVE-2026-49178, a remote code execution flaw in Active Directory Domain Services that allows attackers with low-level domain credentials to take over domain controllers. The vulnerability affects all supported Windows Server versions and demands immediate patching to prevent complete network compromise.
Microsoft’s July 2026 Surface Firmware Update Closes a High-Severity Privilege Escalation Hole (CVE-2026-48581)
On July 14, 2026, Microsoft disclosed CVE-2026-48581, a high-severity privilege-escalation flaw in Surface firmware that lets local attackers take full control of affected devices. The fix requires a dedicated firmware update, not just a standard Windows patch, and affects multiple Surface lines including Pro 8, Laptop 4, Go, Hub, and Dev Kit. While no active exploits are known, organizations and home users should prioritize the update to prevent stealthy post-compromise attacks.
High-Severity DoS Vulnerability in ASP.NET OData Requires Immediate NuGet Update (CVE-2026-45646)
Microsoft disclosed CVE-2026-45646, a high-severity denial-of-service vulnerability in ASP.NET OData packages. Affected applications must update NuGet packages to versions 7.8.0 or 9.5.0 and redeploy. OS-level patching does not mitigate the risk; immediate action is required for internet-facing services.
Microsoft's July 2026 Update Fixes Critical DHCP Server Flaw — Here's Your Action Plan
Microsoft's July 2026 Patch Tuesday fixes CVE-2026-48564, a critical heap-based buffer overflow in Windows DHCP Server that allows low-privileged attackers to achieve remote code execution. The update covers all supported Windows Server versions from 2012 to 2025 and also addresses two even more severe unauthenticated DHCP RCE flaws. Admins should prioritize patching DHCP servers and validate failover and lease operations immediately.
Update Now: Microsoft’s July Patch Slams Shut a High-Severity Push Notification Privilege Escalation Hole
Microsoft’s July 2026 security updates fix a high-severity privilege escalation flaw (CVE-2026-44800) in Windows Push Notifications, affecting Windows 11 and Server 2025. A local attacker could exploit a race condition to gain system-level control, and while no active attacks are reported, patching is urgent. The fix is included in the cumulative updates; verification build numbers and update KBs are provided.
Microsoft Fixes Remote LSASS Vulnerability That Can Take Down Windows Domain Controllers
Microsoft's July 2026 security updates patch CVE-2026-40378, a critical remote denial-of-service vulnerability in Windows LSASS. The flaw allows unauthenticated attackers to crash domain controllers and disrupt authentication across networks, affecting a wide range of Windows client and server versions. Administrators should immediately deploy the fix, prioritize domain controllers, and verify build compliance.
July 2026 Windows Update Closes Door on No-Authentication Network DoS in Schannel
Microsoft's July 14, 2026 security updates address CVE-2026-44806, a network-exploitable denial-of-service flaw in Windows Secure Channel. The vulnerability requires no authentication or user interaction, just network access to a system running TLS services. While technically medium in severity, its remote exploitability makes immediate patching essential for any exposed Windows server.
Microsoft’s July Updates Close a Backdoor in Windows Event Logs That Could Leak Your Most Sensitive Information
Microsoft's July 2026 security updates patch a vulnerability (CVE-2026-34348) in the Windows Event Logging Service that lets a low-privilege attacker read sensitive data over the network. The fix spans Windows 10, 11, and multiple Server versions, with builds specified. Administrators should roll out the cumulative updates immediately, prioritizing servers that handle valuable data, and verify the patched builds.
Microsoft Ships Fix for PowerShell Path Traversal RCE (CVE-2026-40400) – Here’s What to Patch First
Microsoft’s July 14, 2026 security updates fix CVE-2026-40400, a high-severity Windows PowerShell remote code execution vulnerability with a CVSS 8.0 score. The flaw requires authenticated access and user interaction but can lead to full system compromise, affecting a wide range of Windows client and server versions. The article explains the technical details, assesses risk for different users, and provides a step-by-step guide to patching and temporary mitigations.
Microsoft’s July Patch Tuesday Fixes File Explorer Flaw That Could Expose Private Data on Shared PCs
Microsoft’s July 2026 security updates fix CVE-2026-40422, a File Explorer bug that could leak data to a local attacker. The patch is important but not urgent for most home users, though shared PCs and managed fleets should act quickly.