# CVE-2026-109469: Microsoft Entra Device Registration authorization bypass in key validation

Source: https://junglewise.ai/threats/cve-2026-109469-authorization-bypass-through-user-controlled-key-in-entra-device  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-109469 · Severity: critical · CVSS 10 · Published 2026-11-06

Microsoft Entra Device Registration, which manages corporate device identity and access, contains a flaw that allows an attacker to bypass authorization checks by manipulating a cryptographic key parameter. An attacker can exploit this over the network to gain unauthorized access and escalate privileges, potentially compromising device and user security across an organization.

Vendors: [Microsoft](https://junglewise.ai/threats/vendors/microsoft).

## Quick answers

**Is CVE-2026-109469 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-109469 being exploited in the wild.

**How severe is CVE-2026-109469?** Critical severity, with a CVSS score of 10, published 6 November 2026.

**Which products and versions are affected?** Microsoft Entra Device Registration.

**Is there a fix for CVE-2026-109469?** 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-2026-109469 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-109469?** Check whether you run Microsoft Entra Device Registration. 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

An authorization bypass vulnerability in Entra Device Registration stems from insufficient validation of a user-controlled cryptographic key used in the registration or authentication process. The flaw allows unauthenticated or low-privileged attackers to supply a crafted key value that bypasses authorization checks, leading to privilege escalation over the network without requiring valid credentials or user interaction.

## Affected products

- Microsoft Entra Device Registration

## Timeline

- 2026-11-06: disclosed

## References

- [https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109469](https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-109469)