What’s Vulnerable › Vulnerabilities

CVE-2020-1455: Microsoft SQL Server Management Studio Denial of Service Vulnerability

• Severity: low (CVSS 2.1 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-08-17 · updated 2026-06-17

Description

A denial of service vulnerability exists when Microsoft SQL Server Management Studio (SSMS) improperly handles files. An attacker could exploit the vulnerability to trigger a denial of service. To exploit the vulnerability, an attacker would first require execution on the victim system. The security update addresses the vulnerability by ensuring Microsoft SQL Server Management Studio properly handles files.

Affected products

• Microsoft SQL Server Management Studio: before 18.6 — fixed in 18.6
• Microsoft SQL Server Management Studio: from 18.0 before publication — fixed in publication

How to fix

Upgrade to a fixed version: Microsoft SQL Server Management Studio 18.6; Microsoft SQL Server Management Studio publication. Check the vendor advisory for mitigations.

References

• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1455
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1455

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