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CVE-2020-0796

Critical CVSS 10 Known exploited

Published 2020-03-12 · last changed 2026-08-12 · added to CISA KEV 2022-02-10

This one is being exploited in the wild.

CISA added CVE-2020-0796 to the Known Exploited Vulnerabilities catalog on 2022-02-10. Federal agencies are required to remediate it on a deadline. If you have affected machines, this is the class of finding that moves ahead of the rest of the queue.

The fix

We hold no Microsoft remediation data for CVE-2020-0796, which normally means it is not a Windows CVE. For non-Microsoft software the fix is the vendor's own updated release, and the affected versions are listed below.

What it is

A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests, aka 'Windows SMBv3 Client/Server Remote Code Execution Vulnerability'.

Sources

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H