QTS, QuTS hero
Published Feb 11, 2026
9.2
CRITICALCVSS 4.0
EPSS 0.67%
Description
A link following vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to traverse the file system to unintended locations.
We have already fixed the vulnerability in the following versions: QTS 5.2.8.3350 build 20251216 and later QuTS hero h5.3.2.3354 build 20251225 and later QuTS hero h5.2.8.3350 build 20251216 and later
Affected products
-
- Version 5.2.xStatusaffectedConstraints<5.2.8.3350 build 20251216
- Version
-
- Version h5.2.xStatusaffectedConstraints<h5.2.8.3350 build 20251216
- Version h5.3.xStatusaffectedConstraints<h5.3.2.3354 build 20251225
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| QNAP Systems Inc. | QTS | unaffected |
| |||||||||
| QNAP Systems Inc. | QuTS hero | unaffected |
|
Configuration 1
- 5.2.0.2737
- 5.2.0.2744
- 5.2.0.2782
- 5.2.0.2802
- 5.2.0.2823
- 5.2.0.2851
- 5.2.0.2860
- 5.2.1.2930
- 5.2.2.2950
- 5.2.3.3006
- 5.2.4.3070
- 5.2.4.3079
- 5.2.4.3092
- 5.2.5.3145
- 5.2.6.3195
- 5.2.6.3229
- 5.2.7.3256
- 5.2.7.3297
- 5.2.8.3332
Configuration 2
- h5.2.0.2737
- h5.2.0.2782
- h5.2.0.2789
- h5.2.0.2802
- h5.2.0.2823
- h5.2.0.2851
- h5.2.0.2860
- h5.2.1.2929
- h5.2.1.2940
- h5.2.2.2952
- h5.2.3.3006
- h5.2.4.3070
- h5.2.4.3079
- h5.2.5.3138
- h5.2.6.3195
- h5.2.7.3256
- h5.2.7.3297
- h5.2.8.3321
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
Vendor solution
We have already fixed the vulnerability in the following versions: QTS 5.2.8.3350 build 20251216 and later QuTS hero h5.3.2.3354 build 20251225 and later QuTS hero h5.2.8.3350 build 20251216 and later
Metrics
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
1 other source (NVD) ▾
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/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:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
No CVSS v3.0 score for this CVE.
No CVSS v2.0 score for this CVE.
This CVE is not in the KEV list.
CISA SSVC (Vulnrichment)
Stakeholder-Specific Vulnerability Categorization from CISA ADP.
Exploitation
NoneAutomatable
YesTechnical Impact
TotalDecision
n/aAssessed Feb 12, 2026 · SSVC 2.0.3
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
Feb–Oct 2026- EPSS v4
- EPSS v5
Percentile over time
- EPSS v4
- EPSS v5
Table of values (3 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 0.67% (0.00672) | 50.26th | v5 (v2026.06.15) |
| Jun 15, 2026 | 0.63% (0.00633) | 45.37th | v5 (v2026.06.15) |
| Feb 12, 2026 | 0.08% (0.00077) | 22.92th | v4 (v2025.03.14) |
References (1)
- https://www.qnap.com/en/security-advisory/qsa-26-05 Vendor Advisory
| Link | Providers | Tags |
|---|---|---|
| https://www.qnap.com/en/security-advisory/qsa-26-05 | Vendor Advisory |
Change history (0)
No recorded changes yet.