Microsoft SMBv3 Remote Code Execution Vulnerability (CVE-2020-0796)
Severity: critical · Patch status: patched · Since 2022-02-10 · CVE-2020-0796
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. CISA added CVE-2020-0796 to its Known Exploited Vulnerabilities catalog on Feb 10, 2022, which means attackers are exploiting it in the wild. CISA reports known use in ransomware campaigns.
What to do
- Apply updates per vendor instructions.
- US federal agencies must remediate by Aug 10, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
