---
id: CVE-2026-94510
title: >-
  Authorization bypass through user-controlled key in Microsoft Bookings allows
  an unauthorized attacker to elevate privileges over a network.
summary: >-
  Authorization bypass through user-controlled key in Microsoft Bookings allows
  an unauthorized attacker to elevate privileges over a network.
severity: critical
cvss: 9.9
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:H/A:L'
cwe:
  - CWE-639
published: '2026-10-08'
updated: '2026-10-10'
sourceUpdated: '2026-10-10T04:18:19.577'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-94510'
references:
  - url: 'https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-94510'
    label: secure@microsoft.com
tags:
  - nvd
  - cve.org
epss: 0.00566
epssPercentile: 0.46806
ingestedAt: '2026-10-09T00:19:50.980Z'
vendor: Microsoft
product: Microsoft Bookings
affected:
  - bookings -
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: total
  timestamp: '2026-10-09T00:00:00+00:00'
---

## Overview

Authorization bypass through user-controlled key in Microsoft Bookings allows an unauthorized attacker to elevate privileges over a network.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.