CVE-2025-62858: QTS, QuTS hero
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
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
QTSto a version that resolves this vulnerability.Fixed in 5.2.9.3410 build 20260214 - Upgrade
Upgrade
QuTS heroto a version that resolves this vulnerability.Fixed in h5.2.9.3410 build 20260214 - Upgrade
Upgrade
QuTS heroto a version that resolves this vulnerability.Fixed in h5.3.4.3500 build 20260520 - Upgrade
Upgrade
QuTS heroto a version that resolves this vulnerability.Fixed in h6.0.0.3397 build 20260206
Event History
Frequently Asked Questions
What is the severity of CVE-2025-62858?
CVE-2025-62858 has a medium severity rating of 5.1.
How do I fix CVE-2025-62858?
To fix CVE-2025-62858, update to QTS 5.2.9.3410 and later, or to the specified builds of QuTS hero.
What type of vulnerability is CVE-2025-62858?
CVE-2025-62858 is classified as a buffer overflow vulnerability.
What can an attacker do if they exploit CVE-2025-62858?
An attacker with administrator access can exploit CVE-2025-62858 to modify memory or crash processes.
Which QNAP operating systems are affected by CVE-2025-62858?
CVE-2025-62858 affects certain versions of QNAP QTS and QuTS hero.