Remote code execution via integer overflow
Published Sep 8, 2026 · Updated Sep 10, 2026
Integer overflow in Microsoft SQL Server 2017 and 2019 allows remote attackers to execute code through a network request. Microsoft identifies integer and heap-based overflows but has not disclosed the affected code locus, processed input, or erroneous size calculation. Exploitation requires user interaction and can run attacker-controlled code with the compromised SQL Server process's privileges.
Summary
What happened
Integer overflow in Microsoft SQL Server 2017 and 2019 allows remote attackers to execute code through a network request. Microsoft identifies integer and heap-based overflows but has not disclosed the affected code locus, processed input, or erroneous size calculation. Exploitation requires user interaction and can run attacker-controlled code with the compromised SQL Server process's privileges.
The record
- CVE
- CVE-2026-77486
- Published
- Sep 8, 2026
- Updated
- Sep 10, 2026
- Vendor
- Microsoft
- Product
- Microsoft SQL Server 2019
- Classifications
- CWE-122, CWE-190, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 8, 2026CVE publishedPublication date reported by the CVE source.
- Sep 10, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=15.0.0.0 <15.0.4490.9
- Affected versionversion=15.0.0 <15.0.2190.7
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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