QTS, QuTS hero
Summary
| CVE | CVE-2025-53406 |
|---|---|
| State | PUBLISHED |
| Assigner | qnap |
| Source Priority | CVE Program / NVD first with legacy fallback |
| Published | 2025-10-03 19:15:48 UTC |
| Updated | 2026-06-17 09:38:08 UTC |
| Description | A use of externally-controlled format string 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 obtain secret data or modify memory. We have already fixed the vulnerability in the following versions: QTS 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later |
Risk And Classification
Primary CVSS: v4.0 5.1 MEDIUM from [email protected]
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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
EPSS: 0.003640000 probability, percentile 0.286430000 (date 2026-10-18)
Problem Types: CWE-134 | CWE-134 CWE-134
| Version | Source | Type | Score | Severity | Vector |
|---|---|---|---|---|---|
| 4.0 | [email protected] | Secondary | 5.1 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/C... |
| 4.0 | CNA | CVSS | 5.1 | MEDIUM | CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| 3.1 | [email protected] | Primary | 6.5 | MEDIUM | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N |
CVSS v4.0 Breakdown
Attack Vector
NetworkAttack Complexity
LowAttack Requirements
NonePrivileges Required
HighUser Interaction
NoneConfidentiality
NoneIntegrity
NoneAvailability
LowSub Conf.
NoneSub Integrity
NoneSub Availability
NoneCVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/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
CVSS v3.1 Breakdown
Attack Vector
NetworkAttack Complexity
LowPrivileges Required
HighUser Interaction
NoneScope
UnchangedConfidentiality
HighIntegrity
HighAvailability
NoneCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
NVD Known Affected Configurations (CPE 2.3)
| Type | Vendor | Product | Version | Update | Edition | Language |
|---|---|---|---|---|---|---|
| Operating System | Qnap | Qts | 5.2.0.2737 | build_20240417 | All | All |
| Operating System | Qnap | Qts | 5.2.0.2744 | build_20240424 | All | All |
| Operating System | Qnap | Qts | 5.2.0.2782 | build_20240601 | All | All |
| Operating System | Qnap | Qts | 5.2.0.2802 | build_20240620 | All | All |
| Operating System | Qnap | Qts | 5.2.0.2823 | build_20240711 | All | All |
| Operating System | Qnap | Qts | 5.2.0.2851 | build_20240808 | All | All |
| Operating System | Qnap | Qts | 5.2.0.2860 | build_20240817 | All | All |
| Operating System | Qnap | Qts | 5.2.1.2930 | build_20241025 | All | All |
| Operating System | Qnap | Qts | 5.2.2.2950 | build_20241114 | All | All |
| Operating System | Qnap | Qts | 5.2.3.3006 | build_20250108 | All | All |
| Operating System | Qnap | Qts | 5.2.4.3070 | build_20250312 | All | All |
| Operating System | Qnap | Qts | 5.2.4.3079 | build_20250321 | All | All |
| Operating System | Qnap | Qts | 5.2.4.3092 | build_20250403 | All | All |
| Operating System | Qnap | Qts | 5.2.5.3145 | build_20250526 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.0.2737 | build_20240417 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.0.2782 | build_20240601 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.0.2789 | build_20240607 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.0.2802 | build_20240620 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.0.2823 | build_20240711 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.0.2851 | build_20240808 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.0.2860 | build_20240817 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.1.2929 | build_20241025 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.1.2940 | build_20241105 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.2.2952 | build_20241116 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.3.3006 | build_20250108 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.4.3070 | build_20250312 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.4.3079 | build_20250321 | All | All |
| Operating System | Qnap | Quts Hero | h5.2.5.3138 | build_20250519 | All | All |
Vendor Declared Affected Products
| Source | Vendor | Product | Version | Platforms |
|---|---|---|---|---|
| CNA | QNAP Systems Inc. | QTS | affected 5.2.x 5.2.6.3195 build 20250715 custom | Not specified |
| CNA | QNAP Systems Inc. | QuTS Hero | affected h5.2.x h5.2.6.3195 build 20250715 custom | Not specified |
References
| Reference | Source | Link | Tags |
|---|---|---|---|
| www.qnap.com/en/security-advisory/qsa-25-36 | [email protected] | www.qnap.com | Vendor Advisory |
| CVE Program record | CVE.ORG | www.cve.org | canonical |
| NVD vulnerability detail | NVD | nvd.nist.gov | canonical, analysis |
Vendor Comments And Credit
Discovery Credit
CNA: coral (en)
Additional Advisory Data
Solutions
CNA: We have already fixed the vulnerability in the following versions: QTS 5.2.6.3195 build 20250715 and later QuTS hero h5.2.6.3195 build 20250715 and later
There are currently no legacy QID mappings associated with this CVE.