VulnerabilityModified
CVE-2021-28809
An improper access control vulnerability has been reported to affect certain legacy versions of HBS 3.
CRITICAL 9.8EPSS 15.8%
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 15.8%, higher than 97% of all known CVEs. Patch or mitigate before the next change window.
Description
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 following versions of HBS 3: QTS 4.3.6: HBS 3 v3.0.210507 and later QTS 4.3.4: HBS 3 v3.0.210506 and later QTS 4.3.3: HBS 3 v3.0.210506 and later
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 15.80% probability · 97th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-284, CWE-306, CWE-749
- Affected
- qnap/hybrid backup sync
- Source
- security@qnapsecurity.com.tw
References
- https://www.qnap.com/en/security-advisory/qsa-21-19Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-783/Third Party Advisory, VDB Entry
- https://www.qnap.com/en/security-advisory/qsa-21-19Vendor Advisory
- https://www.zerodayinitiative.com/advisories/ZDI-21-783/Third Party Advisory, VDB Entry
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.