What is CVE-2026-65669?

CVE-2026-65669 is a critical-severity vulnerability in Microsoft SQL Server Management Studio, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.6/10. Published 2026-09-08.

How severe is CVE-2026-65669?

Critical severity. CVSS v3 base score is 9.6 out of 10.

Vulnerability in Microsoft SQL Server Management Studio

CVE-2026-65669

Improper neutralization of special elements in output used by a downstream component ('injection') in SQL Server allows an unauthorized attacker to elevate privileges over a network.

Published 2026-09-08 · last modified 2026-10-07.

CVSS v3 metric

CVSS v3 base score 9.6 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (58.2th percentile), scored 2026-10-24.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 58th percentile — 58.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: -0.000

Affected products

Weakness classification (CWE)

CWE-74 — Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection)

References

Microsoft SQL Server Elevation of Privilege Vulnerability (vendor-advisory, Patch, patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-65669?: CVE-2026-65669 is a critical-severity vulnerability in Microsoft SQL Server Management Studio, classified under Improper Neutralization of Special Elements in Output Used by a Downstream Component (Injection). CVSS score: 9.6/10. Published 2026-09-08.
How severe is CVE-2026-65669?: Critical severity. CVSS v3 base score is 9.6 out of 10.