CVE-2025-30265 QTS, QuTS hero

What is CVE-2025-30265?

CVE-2025-30265 is a low-severity memory corruption vulnerability in Qnap Qts, published on 29 Aug 2025. Any signed-in user can exploit it over the network, with no action from the victim.

Official 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 5.2.5.3145 build 20250526 and later QuTS hero h5.2.5.3138 build 20250519 and later

Weakness: CWE-121, CWE-120

Which versions are affected by CVE-2025-30265?

It affects 2 products.

Products include Qnap Qts, Qnap Quts Hero.

How do I fix CVE-2025-30265?

No fix has been published for CVE-2025-30265 yet. Limit exposure of the affected software until one is available.

Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.

Is CVE-2025-30265 being exploited?

There is no known exploitation of CVE-2025-30265 in the wild and no public exploit code.

Other vulnerabilities in Qnap Qts

• CVE-2020-2509 QNAP Network-Attached Storage (NAS) Command Injection Exploited Critical 9.8
• CVE-2018-19949 QNAP NAS File Station Command Injection Exploited Critical 9.8
• CVE-2019-7193 QNAP QTS Improper Input Validation Exploited Critical 9.8
• CVE-2018-19943 QNAP NAS File Station Cross-Site Scripting Exploited High 8.0
• CVE-2018-19953 QNAP NAS File Station Cross-Site Scripting Exploited Medium 6.1

All Qnap Qts vulnerabilities

Sources

• CVE record
• NVD
• OSV
• GitHub advisory
• How this page is made

Also known as GHSA-w7x8-hj56-mff5.