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

criticalknown exploitedpublic exploitCVE-2020-0796
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
A remote code execution vulnerability exists in the way that the Microsoft Server Message Block 3.1.1 (SMBv3) protocol handles certain requests. An attacker who successfully exploited the vulnerability could gain the ability to execute code on the target server or client.

CSIRTS triage

vendor: Microsoftproduct: SMBv3Remote code execution
What
A remote code execution vulnerability exists in the way SMBv3 handles certain requests.
Who is affected
Servers and clients using Microsoft SMBv3 are affected.
Urgency
Remediation is urgent as the vulnerability is critical and actively exploited.
Action
Apply the latest security updates for SMBv3.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2022-02-10
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2020-0796

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2020-0796coverage & exploitation statusNVD · CVE.org

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