Assessment
Why it matters
EPSS is 1.0%; technical severity is CVSS 6.1.
A command injection vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to execute arbitrary commands. We have already fixed the vulnerability in the following versions: QTS 5.2.9.3492 build 20260507 and later QuTS hero h5.2.9.3499 build 20260514 and later
Who should care
- Teams operating QTS, Quts Hero
- Vulnerability and exposure management teams
- Security operations teams monitoring exploitation activity
Response plan
What I would do
- Confirm whether QTS, Quts Hero is present in the environment.
- Identify affected versions and establish whether vulnerable services are exposed or reachable.
- Review vendor guidance and identify the supported fix or mitigation.
- Review relevant security telemetry for evidence of attempted or successful exploitation.
- Document the remediation decision and track it to verified completion.
Treatment intelligence
Remediation intelligence
Vendor sources are listed before government and third-party guidance. Confirm product applicability and change prerequisites before deployment.
Verification noteNo explicit patch, upgrade, mitigation or workaround is currently recorded.
Technical details
- CVSS vector
- CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- CWE
- CWE-78
- Affected versions
- QNAP QTS (Start Including 5.2.0.2737, End Excluding 5.2.9.3492); QNAP Quts Hero (Start Including h5.0.0, End Excluding h5.2.9.3499)
- Fixed versions
- QNAP QTS (Fixed from 5.2.9.3492); QNAP Quts Hero (Fixed from h5.2.9.3499)
- Published
- 10 June 2026
- Attack vector
- Network
- Privileges required
- High
- User interaction
- None
Signal timeline
- CVE published
- Latest EPSS score: 1.0%
- Signal calculated at 11