CVE-2020-0796
Actively exploited. CVE-2020-0796 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2022-02-10) — exploitation has been observed in the wild, and US federal agencies are required to remediate it under BOD 22-01. Treat patching as urgent.
Public exploit code is available. Proof-of-concept or working exploit code for CVE-2020-0796 is indexed in Metasploit, Exploit-DB, GitHub PoC and Nuclei. Expect opportunistic scanning and exploitation attempts — prioritize remediation.
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
- 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.
AI-assisted analysis generated from the source advisory — verify against the original.
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Exploitation outlook
- Exploitation confirmedAlready exploited in the wild (CISA KEV) — the prediction phase is over. Patch now. Riskier than 100% of all EPSS-scored CVEs.
Exploit availability
Public exploit or proof-of-concept code for CVE-2020-0796 is indexed in these free datasets. Available exploit code raises real-world risk independent of the CVSS score.
- MetasploitA Metasploit Framework module targets this CVE — weaponized, point-and-click exploitation.look it up ↗
- Exploit-DBA public exploit is published in the Exploit-DB archive.look it up ↗
- GitHub PoCPublic proof-of-concept repositories on GitHub reference this CVE.look it up ↗
- NucleiA nuclei-templates detection/PoC template exists for this CVE.look it up ↗
Advisory coverage (1)
- criticalexploitedCVE-2020-0796: Microsoft SMBv3 Remote Code Execution Vulnerabilitycisa-kev · 2022-02-10
External references
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[](https://www.csirts.com/cve/CVE-2020-0796)