Auth bypass in Microsoft SQL Server 2022 For X64-Based Systems (Cu 22)
CVE-2026-20803
Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.012 (69.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.012 · change: -0.000
Affected products
- Microsoft SQL Server 2022 For X64-Based Systems (Cu 22) — versions 16.0.0.0
- Microsoft SQL Server 2022 (Gdr) — versions 16.0.0
- Microsoft SQL Server 2025 For X64-Based Systems (Gdr) — versions 17.0.1050.2
- Microsoft SQL Server 2022
- Microsoft SQL Server 2025 — versions 17.0.1000.7
Weakness classification (CWE)
References
- msrc.microsoft.com/update-guide/vulnerability/CVE-2026-20803 (vendor-advisory, patch, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-20803?
- CVE-2026-20803 is a high-severity vulnerability in Microsoft SQL Server 2022 For X64-Based Systems (Cu 22), classified under Missing Authentication for Critical Function. CVSS score: 7.2/10. Published 2026-01-13.
- How severe is CVE-2026-20803?
- High severity. CVSS v3 base score is 7.2 out of 10.