PT-2026-47691 · Qnap Systems · Qts+1

Coral · Published 2026-06-09 · Updated 2026-06-09 · CVE-2025-62858

NVD

CVSS v4.0

5.1

Medium

Base vector

AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/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

A buffer overflow 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 modify memory or crash processes.

We have already fixed the vulnerability in the following versions: QTS 5.2.9.3410 build 20260214 and later QuTS hero h5.2.9.3410 build 20260214 and later QuTS hero h5.3.4.3500 build 20260520 and later QuTS hero h6.0.0.3397 build 20260206 and later

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

CVE-2025-62858

Affected Products

Qts

Quts Hero

References · 2

• https://nvd.nist.gov/vuln/detail/CVE-2025-62858 · Security Note
• https://qnap.com/en/security-advisory/qsa-26-10 · Note