CVE-2026-77488

Integer underflow (wrap or wraparound) in SQL Server allows an authorized attacker to disclose information locally.

Scoring

Severity

MEDIUM

CVSS base score

5.5

CVSS vector

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C

CWE

CWE-191

Published

2026-09-08

Last modified

2026-09-09

Affected products

• Microsoft Microsoft SQL Server 2017 (CU 31)
• Microsoft Microsoft SQL Server 2017 (GDR)
• Microsoft Microsoft SQL Server 2019 (CU 32)
• Microsoft Microsoft SQL Server 2019 (GDR)
• Microsoft Microsoft SQL Server 2022 (CU 26)
• Microsoft Microsoft SQL Server 2022 (GDR)
• Microsoft Microsoft SQL Server 2025 (CU8)
• Microsoft Microsoft SQL Server 2025 for x64-based Systems (GDR)

Weakness type

• CWE-191

Related vulnerabilities

• CVE-2026-81977 — Acrobat Reader | Integer Underflow (Wrap or Wraparound) (CWE-191)
• CVE-2026-66307 — Skype for Business and Lync Denial of Service Vulnerability
• CVE-2026-78453 — Microsoft Windows SCSI Class System File Information Disclosure Vulnerability
• CVE-2026-71352 — Windows Remote Access Connection Manager Remote Code Execution Vulnerability
• CVE-2026-69824 — Microsoft Standard XPS Remote Code Execution Vulnerability
• CVE-2026-69687 — Windows USB Audio Class driver (usbaudio.sys) Elevation of Privilege Vulnerability
• CVE-2026-69421 — Windows Kernel-Mode Driver Elevation of Privilege Vulnerability
• CVE-2026-69303 — Push Message Routing Service Information Disclosure Vulnerability

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