CVE-2026-21262

HIGH
2026-03-10 [email protected]
8.8
CVSS 3.1
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CVSS Vector

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

3
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

Tags

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

Description

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

Analysis

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. …

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Remediation

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. …

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Priority Score

64
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +44
POC: +20

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CVE-2026-21262 vulnerability details – vuln.today
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