QNAP NAS Improper Authorization Vulnerability (CVE-2021-28799)
Severity: critical · Patch status: patched · Since 2022-03-31 · CVE-2021-28799
QNAP NAS running HBS 3 contains an improper authorization vulnerability which can allow remote attackers to log in to a device. CISA added CVE-2021-28799 to its Known Exploited Vulnerabilities catalog on Mar 31, 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 Apr 21, 2022 (BOD 22-01); treat that as the outer limit.
Sources
All live incidents on Threat Watch
