What is the CVSS score of CVE-2026-21262?

CVE-2026-21262 has a CVSS 3.1 base score of 8.8 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Sql Server 2019 are affected by CVE-2026-21262?

A HIGH severity vulnerability in SQL Server (CVE-2026-21262) allows authorized users to gain unauthorized elevated privileges across the network, potentially compromising data confidentiality,…. A patch is available.

Is there a public PoC exploit available for CVE-2026-21262?

Yes, a public proof-of-concept exploit is available for CVE-2026-21262. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2026-21262?

Within 24 hours: Inventory all SQL Server instances in production and non-production environments; restrict SQL Server network access to authorized personnel only using firewall rules. Within 7 days: Implement enhanced monitoring and audit logging for privilege escalation attempts; disable unnecessary SQL Server features and service accounts; conduct access review of current SQL Server administrative accounts. Within 30 days: Develop and test a migration plan to patched SQL Server versions once available; implement network segmentation to isolate SQL Server systems; deploy anomaly detection for unusual administrative activity.

Sql Server 2019 CVE-2026-21262

HIGH

Improper Access Control (CWE-284)

2026-03-10 secure@microsoft.com

Authentication Bypass Sql Server 2019 Sql Server 2022 Sql Server 2017 Sql Server 2016 Sql Server 2025

8.8

CVSS 3.1 · Vendor: microsoft

Severity by source

Vendor (microsoft) PRIMARY

8.8 HIGH

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Primary rating from Vendor (microsoft) · only source for this CVE.

CVSS VectorVendor: microsoft

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

PoC Detected

Mar 13, 2026 - 19:33 vuln.today

Public exploit code

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Mar 10, 2026 - 18:18 nvd

HIGH 8.8

DescriptionCVE.org

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

AnalysisAI

SQL Server 2016-2025 contains an improper access control flaw that allows authenticated network attackers to escalate privileges without user interaction. Public exploit code exists for this vulnerability, which carries a CVSS score of 8.8 and affects confidentiality, integrity, and availability. No patch is currently available.

Technical ContextAI

Classified as CWE-284 (Improper Access Control). Improper access control in SQL Server allows an authorized attacker to elevate privileges over a network.