Buffer overflow in QNAP QTS
Priority LOW 8CWE-120Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- Low
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- —
- Confidentiality · integrity · availability
- Low · Low · Low
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA.
Summary
A buffer overflow vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following versions: QTS 5.2.7.3256 build 20250913 and later QuTS hero h5.2.7.3256 build 20250913 and later QuTS hero h5.3.0.3192 build 20250716 and later
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00355 29th percentileScored 2026-11-07
Fix Fixed QTS (QNAP Systems Inc.): 5.2.7.3256 build 20250913QuTS hero (QNAP Systems Inc.): h5.2.7.3256 build 20250913, h5.3.0.3192 build 20250716
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| QNAP | QTS | 5.2.x to before 5.2.7.3256 build 20250913 | 5.2.7.3256 build 20250913 | Patch available | CNA |
| QNAP | QuTS hero | h5.2.x to before h5.2.7.3256 build 20250913; h5.3.x to before h5.3.0.3192 build 20250716 | h5.2.7.3256 build 20250913, h5.3.0.3192 build 20250716 | Patch available | CNA |
- QTS VendorQNAP Affected 5.2.x to before 5.2.7.3256 build 20250913 Fixed in 5.2.7.3256 build 20250913 Patch available CNA
- QuTS hero VendorQNAP Affected h5.2.x to before h5.2.7.3256 build 20250913; h5.3.x to before h5.3.0.3192 build 20250716 Fixed in h5.2.7.3256 build 20250913, h5.3.0.3192 build 20250716 Patch available CNA
CPE configurations NVD · 34
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:qnap:quts_hero:h5.2.0.2737:build_20240417:*:*:*:*:*:* | h5.2.0.2737 build_20240417 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.0.2782:build_20240601:*:*:*:*:*:* | h5.2.0.2782 build_20240601 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.0.2789:build_20240607:*:*:*:*:*:* | h5.2.0.2789 build_20240607 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.0.2802:build_20240620:*:*:*:*:*:* | h5.2.0.2802 build_20240620 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.0.2823:build_20240711:*:*:*:*:*:* | h5.2.0.2823 build_20240711 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.0.2851:build_20240808:*:*:*:*:*:* | h5.2.0.2851 build_20240808 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.0.2860:build_20240817:*:*:*:*:*:* | h5.2.0.2860 build_20240817 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.1.2929:build_20241025:*:*:*:*:*:* | h5.2.1.2929 build_20241025 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.1.2940:build_20241105:*:*:*:*:*:* | h5.2.1.2940 build_20241105 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.2.2952:build_20241116:*:*:*:*:*:* | h5.2.2.2952 build_20241116 | Vulnerable | QNAP |
- cpe:2.3:o:qnap:quts_hero:h5.2.0.2737:build_20240417:*:*:*:*:*:* Versions h5.2.0.2737 build_20240417 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.0.2782:build_20240601:*:*:*:*:*:* Versions h5.2.0.2782 build_20240601 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.0.2789:build_20240607:*:*:*:*:*:* Versions h5.2.0.2789 build_20240607 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.0.2802:build_20240620:*:*:*:*:*:* Versions h5.2.0.2802 build_20240620 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.0.2823:build_20240711:*:*:*:*:*:* Versions h5.2.0.2823 build_20240711 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.0.2851:build_20240808:*:*:*:*:*:* Versions h5.2.0.2851 build_20240808 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.0.2860:build_20240817:*:*:*:*:*:* Versions h5.2.0.2860 build_20240817 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.1.2929:build_20241025:*:*:*:*:*:* Versions h5.2.1.2929 build_20241025 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.1.2940:build_20241105:*:*:*:*:*:* Versions h5.2.1.2940 build_20241105 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.2.2952:build_20241116:*:*:*:*:*:* Versions h5.2.2.2952 build_20241116 Vulnerable ·QNAP
Show 24 more CPE
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:qnap:quts_hero:h5.2.3.3006:build_20250108:*:*:*:*:*:* | h5.2.3.3006 build_20250108 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.4.3070:build_20250312:*:*:*:*:*:* | h5.2.4.3070 build_20250312 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.4.3079:build_20250321:*:*:*:*:*:* | h5.2.4.3079 build_20250321 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.5.3138:build_20250519:*:*:*:*:*:* | h5.2.5.3138 build_20250519 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.2.6.3195:build_20250715:*:*:*:*:*:* | h5.2.6.3195 build_20250715 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.3.0.3115:build_20250430:*:*:*:*:*:* | h5.3.0.3115 build_20250430 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.3.0.3145:build_20250530:*:*:*:*:*:* | h5.3.0.3145 build_20250530 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:quts_hero:h5.3.0.3192:build_20250716:*:*:*:*:*:* | h5.3.0.3192 build_20250716 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.0.2737:build_20240417:*:*:*:*:*:* | 5.2.0.2737 build_20240417 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.0.2744:build_20240424:*:*:*:*:*:* | 5.2.0.2744 build_20240424 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.0.2782:build_20240601:*:*:*:*:*:* | 5.2.0.2782 build_20240601 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.0.2802:build_20240620:*:*:*:*:*:* | 5.2.0.2802 build_20240620 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.0.2823:build_20240711:*:*:*:*:*:* | 5.2.0.2823 build_20240711 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.0.2851:build_20240808:*:*:*:*:*:* | 5.2.0.2851 build_20240808 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.0.2860:build_20240817:*:*:*:*:*:* | 5.2.0.2860 build_20240817 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.1.2930:build_20241025:*:*:*:*:*:* | 5.2.1.2930 build_20241025 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.2.2950:build_20241114:*:*:*:*:*:* | 5.2.2.2950 build_20241114 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.3.3006:build_20250108:*:*:*:*:*:* | 5.2.3.3006 build_20250108 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.4.3070:build_20250312:*:*:*:*:*:* | 5.2.4.3070 build_20250312 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.4.3079:build_20250321:*:*:*:*:*:* | 5.2.4.3079 build_20250321 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.4.3092:build_20250403:*:*:*:*:*:* | 5.2.4.3092 build_20250403 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.5.3145:build_20250526:*:*:*:*:*:* | 5.2.5.3145 build_20250526 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.6.3195:build_20250715:*:*:*:*:*:* | 5.2.6.3195 build_20250715 | Vulnerable | QNAP |
| cpe:2.3:o:qnap:qts:5.2.6.3229:build_20250818:*:*:*:*:*:* | 5.2.6.3229 build_20250818 | Vulnerable | QNAP |
- cpe:2.3:o:qnap:quts_hero:h5.2.3.3006:build_20250108:*:*:*:*:*:* Versions h5.2.3.3006 build_20250108 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.4.3070:build_20250312:*:*:*:*:*:* Versions h5.2.4.3070 build_20250312 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.4.3079:build_20250321:*:*:*:*:*:* Versions h5.2.4.3079 build_20250321 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.5.3138:build_20250519:*:*:*:*:*:* Versions h5.2.5.3138 build_20250519 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.2.6.3195:build_20250715:*:*:*:*:*:* Versions h5.2.6.3195 build_20250715 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.3.0.3115:build_20250430:*:*:*:*:*:* Versions h5.3.0.3115 build_20250430 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.3.0.3145:build_20250530:*:*:*:*:*:* Versions h5.3.0.3145 build_20250530 Vulnerable ·QNAP
- cpe:2.3:o:qnap:quts_hero:h5.3.0.3192:build_20250716:*:*:*:*:*:* Versions h5.3.0.3192 build_20250716 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.0.2737:build_20240417:*:*:*:*:*:* Versions 5.2.0.2737 build_20240417 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.0.2744:build_20240424:*:*:*:*:*:* Versions 5.2.0.2744 build_20240424 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.0.2782:build_20240601:*:*:*:*:*:* Versions 5.2.0.2782 build_20240601 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.0.2802:build_20240620:*:*:*:*:*:* Versions 5.2.0.2802 build_20240620 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.0.2823:build_20240711:*:*:*:*:*:* Versions 5.2.0.2823 build_20240711 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.0.2851:build_20240808:*:*:*:*:*:* Versions 5.2.0.2851 build_20240808 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.0.2860:build_20240817:*:*:*:*:*:* Versions 5.2.0.2860 build_20240817 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.1.2930:build_20241025:*:*:*:*:*:* Versions 5.2.1.2930 build_20241025 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.2.2950:build_20241114:*:*:*:*:*:* Versions 5.2.2.2950 build_20241114 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.3.3006:build_20250108:*:*:*:*:*:* Versions 5.2.3.3006 build_20250108 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.4.3070:build_20250312:*:*:*:*:*:* Versions 5.2.4.3070 build_20250312 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.4.3079:build_20250321:*:*:*:*:*:* Versions 5.2.4.3079 build_20250321 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.4.3092:build_20250403:*:*:*:*:*:* Versions 5.2.4.3092 build_20250403 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.5.3145:build_20250526:*:*:*:*:*:* Versions 5.2.5.3145 build_20250526 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.6.3195:build_20250715:*:*:*:*:*:* Versions 5.2.6.3195 build_20250715 Vulnerable ·QNAP
- cpe:2.3:o:qnap:qts:5.2.6.3229:build_20250818:*:*:*:*:*:* Versions 5.2.6.3229 build_20250818 Vulnerable ·QNAP
Remediation
- Fix · CNA QTS (QNAP Systems Inc.) Fixed in 5.2.7.3256 build 20250913
- Fix · CNA QuTS hero (QNAP Systems Inc.) Fixed in h5.2.7.3256 build 20250913, h5.3.0.3192 build 20250716
Fixed in the same release
Records fixed by the same vendor advisory or release, as the CNA lists them.
- Release ·
QNAP Systems QTS 5.2.7.3256 build 20250913
18 records Highest priority Priority LOW 18 LOW
Other records, highest priority first
- TI-2025-35612 Resource allocation without limits in QNAP QTSPriority LOW 21
- TI-2025-34009 Out-of-bounds read in QNAP QTSPriority LOW 21
- TI-2025-34008 Out-of-bounds read in QNAP QTSPriority LOW 21
- Release ·
QNAP Systems QuTS hero h5.2.7.3256 build 20250913, h5.3.0.3192 build 20250716
3 records Highest priority Priority LOW 3 LOW
Other records, highest priority first
- TI-2025-32909 Buffer overflow in QNAP QTSPriority LOW 8
- TI-2025-32901 Buffer overflow in QNAP QTSPriority LOW 8
Timeline
- 2026-10-02 Threatist record created from CVE-2025-52863
- 2026-10-03 Alias added: GHSA-2m4f-hqj2-29hr
References
More QNAP Qts vulnerabilities
- TI-2020-02221 Command Injection Vulnerability in QTS and QuTS hero KEVCVSS 3.1CRITICAL 9.8
- TI-2019-05101 Improper input validation in QNAP NAS devices KEVCVSS 3.1CRITICAL 9.8
- TI-2018-14137 Improper input validation in QNAP QTS KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05975 GNU Bash through 4.3 bash43-025 processes trailing strings after certain malformed… KEVCVSS 3.1CRITICAL 9.8
- TI-2014-05157 GNU Bash through 4.3 processes trailing strings after function definitions in the values… KEVCVSS 3.1CRITICAL 9.8
- TI-2018-14131 Cross-site scripting in QNAP QTS KEVCVSS 3.1HIGH 8.0
Sources
- CVE-2025-52863 · CVE Program
- CVE-2025-52863 · NVD
- FIRST EPSS
- GHSA-2m4f-hqj2-29hr · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences