# CVE-2026-70122: Windows Broadcast DVR User Service privilege elevation

Source: https://junglewise.ai/threats/cve-2026-70122-time-of-check-time-of-use-toctou-race-condition-in-windows  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-13. Updated: 2026-10-16  
License: CC BY 4.0 with a link back

CVE-2026-70122 · Severity: medium · CVSS 6.5 · Published 2026-10-13

Windows Broadcast DVR User Service contains a race condition that allows an authorized local user to gain elevated privileges on the system. An attacker with a standard user account could exploit this flaw to run code with higher system permissions, potentially compromising the security of the entire computer.

Technologies: [Microsoft Windows Broadcast DVR User Service](https://junglewise.ai/threats/technologies/windows-broadcast-dvr-user-service). Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-70122 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-70122 being exploited in the wild.

**How severe is CVE-2026-70122?** Medium severity, with a CVSS score of 6.5, published 13 October 2026.

**Which products and versions are affected?** Microsoft Windows Broadcast DVR User Service.

**Is there a fix for CVE-2026-70122?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-70122 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-70122?** Check whether you run Microsoft Windows Broadcast DVR User Service. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

A time-of-check time-of-use (TOCTOU) race condition exists in Windows Broadcast DVR User Service. The vulnerability requires an authenticated local attacker and allows privilege escalation through a race condition between security checks and privileged operations. A fix is available from Microsoft.

## Affected products

- Microsoft Windows Broadcast DVR User Service

## Timeline

- 2026-10-13: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70122](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70122)

## Related threats

- [Windows Broadcast DVR User Service heap overflow privilege escalation](https://junglewise.ai/threats/cve-2026-95871-heap-based-buffer-overflow-in-windows-broadcast-dvr-user-service)
- [Windows Broadcast DVR User Service use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-113762-use-after-free-in-windows-broadcast-dvr-user-service-allows-an)
- [Microsoft Windows Broadcast DVR User Service use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-97807-use-after-free-in-windows-broadcast-dvr-user-service-allows-an)
- [Windows Broadcast DVR User Service use-after-free privilege escalation](https://junglewise.ai/threats/cve-2026-88113-use-after-free-in-windows-broadcast-dvr-user-service-allows-an)
- [Windows Broadcast DVR User Service improper authorization](https://junglewise.ai/threats/cve-2026-70148-improper-authorization-in-windows-broadcast-dvr-user-service)