OnlyFm252
SQL Server

CVE-2026-21262 — SQL Server Elevation of Privilege Vulnerability

Important CVSS 8.8 EPSS 0.02044 📢 Publicly disclosed 2026-03 archive

Executive Summary

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

Overview

8.8
CVSS HIGH
Important
MS Severity
Not Exploited
MS Exploit Status
Less Likely
MS Exploit Likelihood
Category Elevation of Privilege
Released Mar 10 2026
Last Updated Mar 10 2026
Publicly Disclosed Yes
CISA KEV Not Listed
Known Exploits None Known
EPSS Score 0.02044 — 0.78662 percentile
NVD CVSS 8.8 HIGH — matches MSRC

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C
ATTACK VECTOR
Network
ATTACK COMPLEXITY
Low
PRIVILEGES REQUIRED
Low
USER INTERACTION
None
SCOPE
Unchanged
CONFIDENTIALITY
High
INTEGRITY
High
AVAILABILITY
High
EXPLOIT CODE MATURITY
Unproven
REMEDIATION LEVEL
Official Fix
REPORT CONFIDENCE
Confirmed
Temporal Score: 7.7

EPSS Score

0.02044
probability of exploitation in the next 30 days
0.78662 percentile - updated 2026-06-21
View on FIRST.org

Affected Products

10 affected products
Product KB Article Severity Impact Restart Required
Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 (GDR) 5077474 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2016 for x64-based Systems Service Pack 3 Azure Connect Feature Pack 5077473 (Monthly Rollup) Important Elevation of Privilege Maybe
Microsoft SQL Server 2017 for x64-based Systems (CU 31) 5077471 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2017 for x64-based Systems (GDR) 5077472 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2019 for x64-based Systems (CU 32) 5077469 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2019 for x64-based Systems (GDR) 5077470 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2022 for x64-based Systems (CU 23) 5077464 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2022 for x64-based Systems (GDR) 5077465 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2025 for x64-based Systems (CU2) 5077466 (Security Update) Important Elevation of Privilege Maybe
Microsoft SQL Server 2025 for x64-based Systems (GDR) 5077468 (Security Update) Important Elevation of Privilege Maybe

Patches

10 patches
Article Type Restart
5077474 Security Update Maybe
5077473 Monthly Rollup Maybe
5077471 Security Update Maybe
5077472 Security Update Maybe
5077469 Security Update Maybe
5077470 Security Update Maybe
5077464 Security Update Maybe
5077465 Security Update Maybe
5077466 Security Update Maybe
5077468 Security Update Maybe

Known Exploits

Acknowledgments

Erland Sommarskog

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