Summary
Impact: Remote Code Execution. Microsoft rating: Important. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
How could an attacker exploit this vulnerability?
An attacker could host a malicious server and convince a user to connect to it from an affected client. When the client processes the server's response, the attacker could execute code on the client system. User interaction is required.
Security updates
14.0.2130.4 — https://support.microsoft.com/help/5122775
15.0.2190.7 — https://support.microsoft.com/help/5122773
14.0.3550.4 — https://support.microsoft.com/help/5122774
15.0.4490.9 — https://support.microsoft.com/help/5122772
Vulnerabilities 1
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High 8.8
Microsoft SQL Server Remote Code Execution Vulnerability
Integer overflow or wraparound in SQL Server allows an unauthorized attacker to execute code over a network.
Revision history
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#1
Information published.
References
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CVE-2026-77486 Microsoft SQL Server Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-77486
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Microsoft Exploitability Index
https://www.microsoft.com/en-us/msrc/exploitability-index?rtc=1
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Microsoft Support Lifecycle
https://support.microsoft.com/lifecycle
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Common Vulnerability Scoring System
https://www.first.org/cvss