CVE-2026-88105

Analyzed Analyzed - Analysis Complete

Use After Free in Windows Broadcast DVR User Service Allows Local Privilege Escalation

Publication date: 2026-10-13

Last updated on: 2026-10-16

Assigner: Microsoft Corporation

Description

Use after free in Windows Broadcast DVR User Service allows an authorized attacker to elevate privileges locally.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-10-13

Last Modified

2026-10-16

Generated

2026-10-19

AI Q&A

2026-10-14

EPSS Evaluated

2026-10-18

NVD

CVE-2026-88105

EUVD

EUVD-2026-100084

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-416	The product reuses or references memory after it has been freed. At some point afterward, the memory may be allocated again and saved in another pointer, while the original pointer references a location somewhere within the new allocation. Any operations using the original pointer are no longer valid because the memory "belongs" to the code that operates on the new pointer.

Attack-Flow Graph

Executive Summary

This vulnerability is a use after free issue in the Windows Broadcast DVR User Service. It allows an authorized attacker with local access to elevate their privileges on the system. Use after free refers to a memory corruption flaw where a program continues to use memory after it has been freed, potentially leading to arbitrary code execution.

Detection Guidance

This vulnerability involves a use-after-free issue in the Windows Broadcast DVR User Service. Detection typically requires monitoring for unusual privilege escalation events or service crashes. Check Windows Event Viewer for errors related to the Broadcast DVR User Service (bcastdvruserservice.exe) or privilege escalation logs. Use commands like 'sc query bcastdvruserservice' to verify service status and 'wevtutil qe System /q:"*[System[EventID=4624]]"' to review logon events.

Impact Analysis

An attacker could exploit this to gain higher privileges on your system, allowing them to install programs, view or delete data, or create new accounts with full user rights. This could lead to complete system compromise if exploited successfully.

Compliance Impact

This vulnerability allows local privilege escalation, which could enable unauthorized access to sensitive data or system functions. For GDPR, this may increase risks of unauthorized data access or processing, potentially violating confidentiality requirements. For HIPAA, it could lead to unauthorized access to protected health information, compromising integrity and confidentiality.

Mitigation Strategies

Apply the latest Windows security updates from Microsoft to patch the Broadcast DVR User Service vulnerability. Monitor Microsoft's security advisories for updates and disable unnecessary services if not required.

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