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CVE-2026-42990: SQL Server ODBC driver Elevation of Privilege Vulnerability

criticalCVSS 9.8CVE-2026-42990
Heap-based buffer overflow in SQL Server ODBC driver allows an unauthorized attacker to execute code over a network.

CSIRTS triage

vendor: Microsoftproduct: SQL Server ODBC driverPrivilege escalation
What
Heap-based buffer overflow allows an unauthorized attacker to execute code over a network.
Who is affected
Users of SQL Server ODBC driver.
Urgency
Remediation is critical due to the critical severity and potential for remote code execution.
Action
Apply the latest security patch for SQL Server ODBC driver.

AI-assisted analysis generated from the source advisory — verify against the original.

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Details

Source
Microsoft Security Response Center (INTL · vendor-psirt · site)
Severity
critical — CVSS 9.8
Published
2026-07-14
Exploitation
Not in CISA KEV at last sync

Original advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42990

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2026-42990coverage & exploitation statusNVD · CVE.org

Same CVEs, other sources

How other CERTs, PSIRTs and databases cover the vulnerabilities in this advisory.

Recent advisories for SQL Server ODBC

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from Microsoft Security Response Center