What is CVE-2026-70003?

CVE-2026-70003 is a high-severity vulnerability in Microsoft Jdbc Driver For SQL Server 13.4, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.7/10. Published 2026-11-10.

How severe is CVE-2026-70003?

High severity. CVSS v3 base score is 8.7 out of 10.

Vulnerability in Microsoft Jdbc Driver For SQL Server 13.4

CVE-2026-70003

Improper verification of cryptographic signature in JDBC Driver for SQL Server allows an unauthorized attacker to bypass a security feature over a network.

Published 2026-11-10 · last modified 2026-11-10.

CVSS v3 metric

CVSS v3 base score 8.7 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/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

Microsoft Jdbc Driver For SQL Server 13.4

Weakness classification (CWE)

CWE-347 — Improper Verification of Cryptographic Signature

References

msrc.microsoft.com/update-guide/vulnerability/CVE-2026-70003 (vendor-advisory, patch)

Frequently asked questions

What is CVE-2026-70003?: CVE-2026-70003 is a high-severity vulnerability in Microsoft Jdbc Driver For SQL Server 13.4, classified under Improper Verification of Cryptographic Signature. CVSS score: 8.7/10. Published 2026-11-10.
How severe is CVE-2026-70003?: High severity. CVSS v3 base score is 8.7 out of 10.