CVE-2026-66309CWE-284broken-access-control

CVE-2026-66309

Critical · published August 21, 2026

CVSS v3.1
9.1
EPSS
1%
Percentile
58.2
In the wild
Unconfirmed
What it is

Improper access control in Azure SQL Database allows an authorized attacker to elevate privileges over a network.

The record
Technical detail
CVSS v3.1
9.1 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.00862 · 58.2th percentile
Weakness
CWE-284 · Improper Access Control
Published
2026-08-21T02:17Z
Affected products (1)
ProductVersionsFixed in
microsoft/azure_sql_databaseall versions—
References (1)
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-66309 · [email protected]
EPSS history
Timeline
  • 20 AUG 21:47Z
    Azure SQL Database Elevation of Privilege Vulnerability
    cvelistv5