Summary
Impact: Remote Code Execution. Microsoft rating: Critical. Not known to be exploited — Exploitation Unlikely. Customer action: Required.
Details
According to the CVSS metric, the attack complexity is high (AC:H). What does this mean for this vulnerability?
An attacker would need specific conditions to be in place (i.e. particular protocol settings, or configurations, etc.) before an attack could succeed, which reduces the likelihood of widespread or opportunistic exploitation.
Security updates
15.0.2190.7 — https://support.microsoft.com/help/5122773
16.0.1200.5 — https://support.microsoft.com/help/5122771
17.0.1135.8 — https://support.microsoft.com/help/5122770
15.0.4490.9 — https://support.microsoft.com/help/5122772
16.0.4275.2 — https://support.microsoft.com/help/5122768
17.0.4085.5 — https://support.microsoft.com/help/5122769
Vulnerabilities 1
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Critical 9.0
Microsoft SQL Server Remote Code Execution Vulnerability
Out-of-bounds read in SQL Server allows an unauthorized attacker to execute code over a network.
Revision history
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#3
The FAQs have been updated for this CVE
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#2
The CVSS vector string was update to reflect that an attacker does not require any privileges to successfully exploit this vulnerability (PR:N). This is an informational change only.
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#1
Information published.
References
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CVE-2026-67636 Microsoft SQL Server Remote Code Execution Vulnerability - HTML
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-67636
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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