What is CVE-2026-88089?

CVE-2026-88089 is a medium-severity vulnerability in Microsoft SQL Server 2017 For X64-Based Systems (Cu31), classified under Improper Input Validation. CVSS score: 6.7/10. Published 2026-10-13.

How severe is CVE-2026-88089?

Medium severity. CVSS v3 base score is 6.7 out of 10.

Buffer overflow in Microsoft SQL Server 2017 For X64-Based Systems (Cu31)

CVE-2026-88089

Heap-based buffer overflow in SQL Server allows an authorized attacker to execute code locally.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-10-13 · last modified 2026-10-13.

CVSS v3 metric

CVSS v3 base score 6.7 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Weakness classification (CWE)

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88089 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-88089?: CVE-2026-88089 is a medium-severity vulnerability in Microsoft SQL Server 2017 For X64-Based Systems (Cu31), classified under Improper Input Validation. CVSS score: 6.7/10. Published 2026-10-13.
How severe is CVE-2026-88089?: Medium severity. CVSS v3 base score is 6.7 out of 10.