CVE-2026-70122: Windows Broadcast DVR User Service Elevation of Privilege Vulnerability
Time-of-check time-of-use (toctou) race condition in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
Other sources
Windows Broadcast DVR User Service Elevation of Privilege Vulnerability
— Microsoft
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.19044.7807Patch KB5126657 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.22631.7652Patch KB5126653 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26100.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26200.9711Patch KB5127648 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.28000.3231Patch KB5127646 - Upgrade
Upgrade to a fixed release to a version that resolves this vulnerability.
Fixed in 10.0.26300.9711Patch KB5127648
Event History
Frequently Asked Questions
Who can exploit this vulnerability?
An attacker must already be authorized on the affected Windows system and have local access. The issue affects Microsoft Windows 10 and Microsoft Windows 11 systems with the Windows Broadcast DVR User Service.
What is the likely security impact?
A successful attack can elevate the attacker’s privileges locally. The provided vector indicates no user interaction is required, and integrity impact is rated high; confidentiality and availability impacts are not indicated.
Is this remotely exploitable?
No. The attack vector is local, so exploitation requires access to the target machine rather than network-only access.