Microsoft Entra CVE-2026-109469: Hosted Service Fully Mitigated, No Customer Action

Microsoft rates CVE-2026-109469 at CVSS 10.0 but says the Entra hosted service is fully mitigated and customers have no action to take.

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A glowing cyan shield and key centered before a cloud and connected network nodes on a dark blue background.
Original editorial illustration for The IT Guys.

Microsoft Entra CVE-2026-109469: hosted service fully mitigated, with no customer action [1][2]

Bottom line: Microsoft rates this Entra Device Registration elevation-of-privilege vulnerability Critical with a CVSS v3.1 base score of 10.0. [1] Microsoft also says it already fully mitigated the hosted-service vulnerability and users have no action to take. [1][2][3]

Original-publication status: Microsoft marked it not publicly disclosed, not exploited, and “Exploitation Less Likely.” [1][2]

Reporting cutoff: November 7, 2026, 6:30 PM EST (2026-11-07T23:30:00Z).

Identifier and impact CVE-2026-109469; Elevation of Privilege; CWE-639. [1][4]
Microsoft score CVSS v3.1: 10.0 base and 8.7 temporal. [1]
Service state Microsoft’s CSAF marks its sole product entry fixed and says customer action is not required. [3]

What the vulnerability means

Microsoft describes an authorization bypass through a user-controlled key in Entra Device Registration that could let an unauthorized network attacker elevate privileges. [1][4]

The CNA record labels the product an exclusively hosted service and uses “-” rather than a customer version or build boundary. [4]

What customers should do

  1. Do not hunt for an emergency patch or build number for this CVE: Microsoft says the service is fully mitigated and no customer action is required. [1][2][3]
  2. Do not apply an invented workaround or unrelated configuration change: the captured advisory provides no customer update instructions because Microsoft says there are no steps users must take. [1][2][3]

Two clocks in Microsoft’s records

The MSRC SUG API records the release as November 5 at 16:00Z, while Microsoft’s CSAF records November 5 at 08:00Z—an eight-hour first-party discrepancy. [2][3]

Microsoft’s “not exploited” and “not publicly disclosed” labels are explicitly assessments at the time of original publication, not an all-time guarantee. [1]

Sources

  1. Microsoft Security Response Center advisory for CVE-2026-109469 — rendered advisory captured at the reporting cutoff.
  2. Microsoft Security Update Guide API record — machine-readable record captured at the reporting cutoff.
  3. Microsoft CSAF advisory — machine-readable advisory captured at the reporting cutoff.
  4. CVE Program CNA record for CVE-2026-109469 — machine-readable CNA record captured at the reporting cutoff.

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