Resource exhaustion in Qnap Qsync Central
CVE-2025-52867
An uncontrolled resource consumption vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack. We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.2 ( 2025/07/31 ) and later
Vulnerability class: DoS (Denial of Service)
EPSS: 0.004 (31.3th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Qnap Qsync_central
- Qnap Systems Inc. Qsync Central — versions 5.0.0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- security@qnapsecurity.com.tw (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-52867?
- CVE-2025-52867 is a medium-severity vulnerability in Qnap Qsync Central, classified under Uncontrolled Resource Consumption. CVSS score: 6.5/10. Published 2025-10-03.
- How severe is CVE-2025-52867?
- Medium severity. CVSS v3 base score is 6.5 out of 10.
- Is CVE-2025-52867 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.