Integer overflow in Microsoft SQL Server 2017 (Cu 31)

CVE-2026-77488

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

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2026-77488?
CVE-2026-77488 is a medium-severity vulnerability in Microsoft SQL Server 2017 (Cu 31), classified under Integer Underflow. CVSS score: 5.5/10. Published 2026-09-08.
How severe is CVE-2026-77488?
Medium severity. CVSS v3 base score is 5.5 out of 10.