CVE-2025-52867: qnap systems inc. qsync central Uncontrolled Resource Consumption
Vulnerability summary
CVE-2025-52867 is a medium (CVSS 6.5) Uncontrolled Resource Consumption vulnerability in qnap systems inc. qsync central. EPSS estimates a 0.41% chance of exploitation in the next 30 days, higher than 34.6% of scored vulnerabilities.
Timeline
- 03-10-2025PublishedVulnerability first disclosed.
- 03-10-2025Last modifiedVulnerability information updated.
Description
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
CVSS metrics
3 scores · 2 sources · 2 versions- NVDNIST6.0MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/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
EPSS trend
Probability
0.41%
Chance of exploitation in the next 30 days
Percentile
35%
Versus all other CVEs
30-day change
0.00 pp
From 0.41% on 21-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root cause- CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
- CWE-770Allocation of Resources Without Limits or ThrottlingThe product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.
Affected systems
Qnap1 product
- qsync_central≥ 5.0.0.0, < 5.0.0.2
Qnap systems inc.1 product
- qsync central≥ 5.0.0, < 5.0.0.2 ( 2025/07/31 )
2 vendors · 2 products
References
1 links- www.qnap.com/en/security-advisory/qsa-25-35Vendor Advisory