All vulnerabilities
CVE-2021-28799

Network Attached Storage (NAS): QNAP NAS Improper Authorization Vulnerability

QNAP Network Attached Storage (NAS)Network & edge
Open in ThreatlineRecord JSON
CVSS
10.0Critical
ExploitationExploited in the wildAdded to KEV 31 Mar 2022. Known ransomware useCISA KEV
Exploit odds (EPSS)78.3%Chance of exploitation activity in the next 30 days, higher than 99% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline21 Apr 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 13 May 2021, 02:55 UTCPublishedCVE List
  2. 31 Mar 2022Added to CISA KEVCISA KEV

Public exploit code and templates 1

  • Scanner templateQNAP HBS 3 - Broken Access ControlNuclei

Listed so defenders can prioritize. Threatline links to the source and does not host exploit code.

Description

QNAP NAS running HBS 3 contains an improper authorization vulnerability which can allow remote attackers to log in to a device.

Text from CVE List

Affected versions 6

  • HBS 3affected: unspecified before v16.0.0415CVE List
  • HBS 3affected: unspecified before v3.0.210412CVE List
  • HBS 3affected: unspecified before v3.0.210411CVE List
  • HBS 3affected: unspecified before v16.0.0419CVE List
  • HBS 2unaffected: all versionsCVE List
  • HBS 1.3unaffected: all versionsCVE List

References 3