SARA / Free Tools / CVE / CVE-2020-0796

CVE-2020-0796 — Microsoft SMBv3 Remote Code Execution Vulnerability

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'.

CVSS
EPSS
94.42% (top 0.00%)
CWE
Published
2020-03-12T15:48:18.000Z
Last modified
2025-10-21T23:35:48.625Z
CVSS vector
CISA KEV — Actively Exploited
Added to KEV
2022-02-10
BOD 22-01 due
2022-08-10
Ransomware use
Known

01What is this vulnerability?

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'.

02Affected products

VendorProductVersions
MicrosoftWindows 10 Version 1903 for 32bit Systems — unspecified
MicrosoftWindows 10 Version 1903 for x64based Systems — unspecified
MicrosoftWindows 10 Version 1903 for ARM64based Systems — unspecified
MicrosoftWindows Server, version 1903 (Server Core installation)unspecified
MicrosoftWindows 10 Version 1909 for 32bit Systems — unspecified
MicrosoftWindows 10 Version 1909 for x64based Systems — unspecified
MicrosoftWindows 10 Version 1909 for ARM64based Systems — unspecified
MicrosoftWindows Server, version 1909 (Server Core installation)unspecified

03Active exploitation status

Yes — actively exploited. Added to the CISA KEV catalog on 2022-02-10. Ransomware use: Known.

04Recommended remediation

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Open the Sigma generator with a pre-filled prompt for this CVE to draft a starting detection in your stack of choice:

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07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

09References

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