Windows Broadcast DVR User Service: Use-after-free privilege escalation
Summary
A use-after-free vulnerability (CWE-416) in the Windows Broadcast DVR User Service allows an authorized local user to elevate privileges. An attacker needs a low-privileged foothold on the system first, and exploitation is rated high complexity. The main risk is on shared workstations, terminal servers and endpoints where users can run untrusted code.
Affected
- Windows 10 Version 1809: 10.0.17763.0 to before 10.0.17763.9487
- Windows 10 Version 21H2: 10.0.19044.0 to before 10.0.19044.7846
- Windows 10 Version 22H2: 10.0.19045.0 to before 10.0.19045.7846
- Windows 11 Version 23H2: 10.0.22631.0 to before 10.0.22631.7711
- Windows 11 Version 24H2: 10.0.26100.0 to before 10.0.26100.9974
- Windows 11 Version 25H2: 10.0.26200.0 to before 10.0.26200.9974
- Windows 11 Version 26H1: 10.0.28000.0 to before 10.0.28000.3501
- Windows 11 Version 26H2: 10.0.26300.0 to before 10.0.26300.9974
- Windows Server editions: Unknown.
Fixed in
- Install the Microsoft security update for November 2026 or later on all affected builds listed above.
- The corresponding KB numbers: Unknown. Use the MSRC Security Update Guide to map builds to updates.
Workaround
- No vendor workaround: Unknown.
- Unverified option: if patching is delayed, disable Broadcast DVR and Game Bar recording features where they are not needed. Test this before rollout.
Exploitation
- No public exploit code known. VulDB records no exploit available.
- CISA SSVC assessment: exploitation none, not automatable, total technical impact.
- CVSS exploit code maturity is unproven.
- No evidence of in-the-wild exploitation found.
Our recommendation
- Patch affected Windows 10 and 11 endpoints in the next regular update cycle, and sooner if exploitation is reported.
- Check the MSRC entry for the exact builds and KB numbers.
- Prioritise shared workstations, terminal servers and endpoints where users run untrusted code.
- Restrict standard-user rights and monitor for privilege escalation.
- Track NVD and CISA KEV for changes and re-check after deployment.
Information from Microsoft (Patch Tuesday November 2026)
- Severity (Microsoft)
- Important
- Impact
- Elevation of privilege – Windows Broadcast DVR User Service
- Status on Patch Tuesday
- Neither exploited nor publicly disclosed
- Exploitability assessment
- Exploitation less likely
- Product family
- Windows, Windows ESU (Extended Security Updates)
- Updates (KB)
- KB5131085, KB5131096, KB5131087, KB5132061, KB5132043, KB5132059
Public exploits
PoC-in-GitHub, Metasploit and Exploit-DB list nothing for this CVE.
Research sources
- Microsoft CNA record (CVE.org) www.cve.org
- MSRC Security Update Guide msrc.microsoft.com
- VulDB vuldb.com
- Strix.ai www.strix.ai
Researched and written up in English and German by an AI (Claude by Anthropic) based on NVD, CISA, EPSS and the sources listed. The vendor information is authoritative. Researched on 11 Nov 2026, 08:47.
Original description (NVD)
Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.
NVD references (1)
Sources
The tracker combines official, freely usable data sources – updated continuously:
- NVD (NIST) – CVEs, rating (CVSS), affected products
- CISA KEV – vulnerabilities confirmed by CISA as actively exploited
- CISA Vulnrichment – CISA assessment (SSVC) in the official CVE record
- FIRST EPSS – probability of exploitation
- Microsoft MSRC – Patch Tuesday: vulnerabilities, severity, updates
- PoC-in-GitHub – public proof-of-concept repositories
- Metasploit (Rapid7) – modules of the Metasploit Framework
- Exploit-DB (OffSec) – archive of public exploits (links only)
- Patch days: official vendor pages (linked per vendor) (Vendor patch days)
This product uses data from the NVD API but is not endorsed or certified by the NVD. EPSS data © FIRST.org.
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