Skip to content
OpenAdvisories

Product · QNAP Systems

HBS 3

2 known vulnerabilities.

HBS 3 at a glance

Last 12 months
0
Critical · all time
2
Exploited · all time
1
Public exploit · all time
0

1 of the exploited vulnerabilities are known to be used by ransomware (CISA).

New vulnerabilities per month · last 12 months
0 1 1 December 2025: 0 vulnerabilities Dec 2025 January 2026: 0 vulnerabilities February 2026: 0 vulnerabilities March 2026: 0 vulnerabilities Mar April 2026: 0 vulnerabilities May 2026: 0 vulnerabilities June 2026: 0 vulnerabilities Jun July 2026: 0 vulnerabilities August 2026: 0 vulnerabilities September 2026: 0 vulnerabilities Sep October 2026: 0 vulnerabilities November 2026: 0 vulnerabilities
Show as table
MonthVulnerabilitiesCritical
Nov 202600
Oct 202600
Sep 202600
Aug 202600
Jul 202600
Jun 202600
May 202600
Apr 202600
Mar 202600
Feb 202600
Jan 202600
Dec 202500
Nov 202500
Oct 202500
Sep 202500
Aug 202500
Jul 202500
Jun 202500
May 202500
Apr 202500
Mar 202500
Feb 202500
Jan 202500
Dec 202400

2 results · Feed

  • Critical 9.8
    CVE-2021-28809 EPSS 16%

    Missing Authentication for Critical Function in RTRR Server in HBS3

    An improper access control vulnerability has been reported to affect certain legacy versions of HBS 3. If exploited, this vulnerability allows attackers to compromise the security of the operating system.QNAP have already fixed this vulnerability in the follo…

  • Critical 10.0
    CVE-2021-28799 Exploited · Ransomware Scanner template EPSS 78%

    Improper Authorization Vulnerability in HBS 3 (Hybrid Backup Sync)

    An improper authorization vulnerability has been reported to affect QNAP NAS running HBS 3 (Hybrid Backup Sync. ) If exploited, the vulnerability allows remote attackers to log in to a device. This issue affects: QNAP Systems Inc. HBS 3 versions prior to v16.…

    KEV Mar 31, 2022