Security November 2026 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.
Severity Important
CVSS base score 8.7
Impact Security Feature Bypass
Exploitation detected No known exploitation (MSRC assessment)
Exploitability Exploitation Less Likely
Publicly disclosed No (MSRC assessment)
EPSS · 30-day forecast No EPSS score collected
Customer action Required: follow the MSRC remediation guidance More details
CVSS vector CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N/E:U/RL:O/RC:C
Public detection template No Nuclei template is listed in the current collected catalog
Component JDBC Driver for SQL Server
Weakness CWE-347: Improper Verification of Cryptographic Signature
Issued by Microsoft
Last revised 10 Nov 2026 CVSS 3.1 base metrics Red raises the risk · green lowers it
Attack vector NetworkAV:N
Attack complexity HighAC:H
Privileges required NonePR:N
User interaction NoneUI:N
Scope ChangedS:C
Confidentiality HighC:H
Integrity HighI:H
Availability NoneA:N
0 KBs No KB listed No KB update is listed in the collected MSRC record. Check the MSRC advisory for product releases and other remedies.
1 affected product
Microsoft JDBC Driver 13.4 for SQL Server Source. This summary comes from MSRC's public CVRF document for November 2026. If the MSRC page is blocked in your browser, the NVD and CVE.org records carry the same identifier. None of this says whether your devices are affected.
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