CVE-2026-77501
Windows DHCP Server Denial of Service vulnerability
MSRC advisory September 8, 2026
Alert details
- Source feed
- Microsoft MSRC
- CVE ID
- CVE-2026-77501
- Affected products
- Windows DHCP Server Denial of Service · Microsoft Windows DHCP Server Denial of Service · Microsoft
What happened
<p>Out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to deny service over a network.</p>
What it means for your business
Windows DHCP Server Denial of Service vulnerability (CVE-2026-77501) was added to Microsoft’s security update guidance. <p>Out-of-bounds read in Windows DHCP Server allows an unauthorized attacker to deny service over a network.</p> If you need help checking exposure, call (864) 335-9223.
Sources
Related briefs
Microsoft Partner Center Elevation of Privilege vulnerability
Microsoft Partner Center Elevation of Privilege vulnerability (CVE-2026-96207) was added to Microsoft’s security update guidance. <p>Improper certificate validation in Microsoft Partner Center allows an unauthorized attacker to elevate privileges over a network.</p> If you need help checking exposure, call (864) 335-9223.
Microsoft Bookings Elevation of Privilege vulnerability
Microsoft Bookings Elevation of Privilege vulnerability (CVE-2026-94510) was added to Microsoft’s security update guidance. <p>Authorization bypass through user-controlled key in Microsoft Bookings allows an unauthorized attacker to elevate privileges over a network.</p> If you need help checking exposure, call (864) 335-9223.
Microsoft Dataverse Remote Code Execution vulnerability
Microsoft Dataverse Remote Code Execution vulnerability (CVE-2026-88131) was added to Microsoft’s security update guidance. <p>Deserialization of untrusted data in Microsoft Dataverse allows an unauthorized attacker to execute code over a network.</p> If you need help checking exposure, call (864) 335-9223.
Azure Event Grid Spoofing vulnerability
Azure Event Grid Spoofing vulnerability (CVE-2026-83947) was added to Microsoft’s security update guidance. <p>Missing authorization in Azure Event Grid allows an authorized attacker to perform spoofing over a network.</p> If you need help checking exposure, call (864) 335-9223.
Need help patching?
PremierePC monitors KEV alerts for managed clients and helps teams prioritize remediation before attackers do.