CVE-2025-33040 Qsync Central

What is CVE-2025-33040?

CVE-2025-33040 is a high-severity vulnerability in Qnap Qsync Central, published on 3 Oct 2025.

Official description

An allocation of resources without limits or throttling vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to prevent other systems, applications, or processes from accessing the same type of resource.

We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.1 ( 2025/07/09 ) and later

Weakness: CWE-770

Which versions are affected by CVE-2025-33040?

It affects 1 product.

Products include Qnap Qsync Central.

How do I fix CVE-2025-33040?

No fix has been published for CVE-2025-33040 yet. Limit exposure of the affected software until one is available.

Is CVE-2025-33040 being exploited?

There is no known exploitation of CVE-2025-33040 in the wild and no public exploit code.

Other vulnerabilities in Qnap Qsync Central

• CVE-2025-29892 Qsync Central High 8.7
• CVE-2025-53595 Qsync Central High 8.6
• CVE-2025-54153 Qsync Central High 8.6
• CVE-2025-30277 Qsync Central High 8.3
• CVE-2025-30278 Qsync Central High 8.3

All Qnap Qsync Central vulnerabilities

Sources

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

Also known as GHSA-rrf3-xq62-qpxc.