What is CVE-2026-88086?

CVE-2026-88086 is a medium-severity vulnerability in Microsoft SQL Server 2019 For X64-Based Systems (Cu32), classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-10-13.

How severe is CVE-2026-88086?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Out-of-bounds Read in Microsoft SQL Server 2019 For X64-Based Systems (Cu32)

CVE-2026-88086

Out-of-bounds read in SQL Server allows an unauthorized attacker to disclose information over an adjacent network.

Vulnerability class: Buffer Overflow

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N.

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)

CWE-125 — Out-of-bounds Read

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-88086 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-88086?: CVE-2026-88086 is a medium-severity vulnerability in Microsoft SQL Server 2019 For X64-Based Systems (Cu32), classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-10-13.
How severe is CVE-2026-88086?: Medium severity. CVSS v3 base score is 5.3 out of 10.