Detections
Analytics

Qnap QTS and QuTS hero Buffer Copy without Checking Size of Input (CVE-2025-52864)

medium Tenable OT Security Plugin ID 505008

Synopsis

The remote OT asset is affected by a vulnerability.

Description

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

This plugin only works with Tenable.ot.
Please visit https://www.tenable.com/products/tenable-ot for more information.

Solution

Refer to the vendor advisory.

See Also

https://www.qnap.com/en/security-advisory/qsa-25-50

Plugin Details

Severity: Medium

ID: 505008

File Name: tenable_ot_qnap_CVE-2025-52864.nasl

Version: 1.2

Type: remote

Family: Tenable.ot

Published: 1/20/2026

Updated: 2/4/2026

Supported Sensors: Tenable OT Security

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 8.5

Temporal Score: 6.3

Vector: CVSS2#AV:N/AC:L/Au:S/C:N/I:C/A:C

CVSS Score Source: CVE-2025-52864

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

CVSS v4

Risk Factor: Medium

Base Score: 5.3

Threat Score: 1.3

Threat Vector: CVSS:4.0/E:U

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N

Vulnerability Information

CPE: cpe:/o:qnap:quts_hero:h5.2, cpe:/o:qnap:quts_hero:h5.3, cpe:/o:qnap:qts:5.2

Required KB Items: Tenable.ot/Qnap

Exploit Ease: No known exploits are available

Patch Publication Date: 1/2/2026

Vulnerability Publication Date: 1/2/2026

Reference Information

CVE: CVE-2025-52864

CWE: 120