Affects Microsoft Bookings (part of Microsoft 365). Exploitable authorization bypass enabling tenant-wide privilege escalation — high-impact for many enterprises.
CVE-2026-94510
Authorization bypass in Microsoft Bookings enabling privilege escalation.
Is CVE-2026-94510 being exploited?
Not confirmed. CVE-2026-94510 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.40% probability of exploitation in the next 30 days.
How severe is CVE-2026-94510?
CVE-2026-94510 is rated Critical with a CVSS score of 9.9. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-94510?
Yes. A fix has been recorded for CVE-2026-94510. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-94510 affect?
CVE-2026-94510 affects Microsoft Bookings, Microsoft 365 (Bookings component). Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-94510?
Apply Microsoft's Bookings security update immediately; rotate keys and review permissions.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
User-controlled key allows attackers to bypass authorization and elevate privileges in Bookings, enabling account takeover, data access/modification, or administrative actions.
Immediate action required