Known exploited vulnerability
CVE-2020-0796
The short answer
CVE-2020-0796 affects Microsoft Windows 10 Version 1903 for 32-bit Systems and is rated critical (CVSS 10.0). CISA added it to the Known Exploited Vulnerabilities catalog on 2022-02-10: attackers are using it, so patch it first. The vendor has linked a patch.
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'.
Weakness: CWE-119.
Severity
10.0 critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
Exploited (CISA KEV)
Yes, since Feb 10, 2022
Federal due date Aug 10, 2022
EPSS, next 30 days
100%
Higher than 100% of scored CVEs
How it can be exploited
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality impact
- High
- Integrity impact
- High
- Availability impact
- High
What CISA says to do
Apply updates per vendor instructions.
Affected products
Windows 10 Version 1903 for 32-bit Systems, Windows 10 Version 1903 for x64-based Systems, Windows 10 Version 1903 for ARM64-based Systems, Windows Server, version 1903 (Server Core installation), Windows 10 Version 1909 for 32-bit Systems, Windows 10 Version 1909 for x64-based Systems, Windows 10 Version 1909 for ARM64-based Systems, Windows Server, version 1909 (Server Core installation). NVD's record lists the exact affected versions.
References
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 PatchVendor Advisory
- portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-0796 PatchVendor Advisory
- www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2020-0796 US Government Resource
Questions
Is CVE-2020-0796 being exploited?
Yes. CISA added CVE-2020-0796 to its Known Exploited Vulnerabilities catalog on 2022-02-10, with a federal remediation due date of 2022-08-10. CISA lists it as used in ransomware campaigns.
How do I fix CVE-2020-0796?
CISA's required action: Apply updates per vendor instructions.
From NVD, CISA KEV, FIRST EPSS and OSV.dev, checked . Status on NVD: Analyzed. The description is NVD's text, quoted as published.
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