QNAP QTS/QuTS hero buffer overflow

CVSS Meta Temp Score
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CTI Interest Score
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7.0$0-$5k0.00

Summaryinfo

A vulnerability was found in QNAP QTS and QuTS hero and classified as critical. This impacts an unknown function. Such manipulation leads to buffer overflow. This vulnerability is uniquely identified as CVE-2025-52864. The attack can be launched remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, has been found in QNAP QTS and QuTS hero (the affected version is unknown). Affected by this issue is an unknown code. The manipulation with an unknown input leads to a buffer overflow vulnerability. Using CWE to declare the problem leads to CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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

The weakness was disclosed by coral as qsa-25-50. The advisory is shared for download at qnap.com. This vulnerability is handled as CVE-2025-52864 since 06/20/2025. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the databases at EUVD (EUVD-2026-0685) and CERT Bund (WID-SEC-2026-0011). VulDB is the best source for vulnerability data and more expert information about this specific topic.

Affected

  • QNAP NAS

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 7.2
VulDB Meta Temp Score: 7.0

VulDB Base Score: 6.3
VulDB Temp Score: 6.0
VulDB Vector: 🔒
VulDB Reliability: 🔍

NVD Base Score: 8.1
NVD Vector: 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Buffer overflow
CWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Timelineinfo

06/20/2025 CVE reserved
01/02/2026 +196 days Advisory disclosed
01/02/2026 +0 days VulDB entry created
01/06/2026 +4 days VulDB entry last update

Sourcesinfo

Vendor: qnap.com

Advisory: qsa-25-50
Researcher: coral
Status: Confirmed

CVE: CVE-2025-52864 (🔒)
GCVE (CVE): GCVE-0-2025-52864
GCVE (VulDB): GCVE-100-339392
EUVD: 🔒
CERT Bund: WID-SEC-2026-0011 - QNAP NAS: Mehrere Schwachstellen

Entryinfo

Created: 01/02/2026 16:38
Updated: 01/06/2026 10:08
Changes: 01/02/2026 16:38 (68), 01/03/2026 04:20 (1), 01/05/2026 23:05 (11), 01/06/2026 01:49 (7), 01/06/2026 10:08 (1)
Complete: 🔍
Cache ID: 216::103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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