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SQL Server

CVE-2026-20803 — Microsoft SQL Server Elevation of Privilege Vulnerability

Important CVSS 7.2 EPSS 0.01242 2026-01 archive

Executive Summary

Missing authentication for critical function in SQL Server allows an authorized attacker to elevate privileges over a network.

Overview

7.2
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Jan 13 2026
Last Updated Jan 13 2026
Publicly Disclosed No
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.01242 — 0.65327 percentile
NVD CVSS 7.2 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
High
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 6.3

EPSS Score

0.01242
probability of exploitation in the next 30 days
0.65327 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

3 affected products
Product KB Article Severity Impact Restart Required
Microsoft SQL Server 2022 for x64-based Systems (CU 22) 5072936 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2022 for x64-based Systems (GDR) 5073031 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2025 for x64-based Systems (GDR) 5073177 (Security Update) Important Elevation of Privilege Maybe

Patches

3 patches
Article Type Restart
5072936 Security Update Maybe
5073031 Security Update Maybe
5073177 Security Update Maybe

Known Exploits

Acknowledgments

Anonymous

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