Authenticated service interruption via NULL dereference
Published Oct 3, 2025 · Updated Oct 3, 2025
NULL pointer dereference in QNAP Qsync Central 4.x allows remote authenticated users to interrupt the service via network requests. QNAP has not disclosed the affected request handler or the specific input path that reaches the NULL pointer dereference. A valid user account is required, and successful exploitation causes denial of service without reported data disclosure or modification.
Summary
What happened
NULL pointer dereference in QNAP Qsync Central 4.x allows remote authenticated users to interrupt the service via network requests. QNAP has not disclosed the affected request handler or the specific input path that reaches the NULL pointer dereference. A valid user account is required, and successful exploitation causes denial of service without reported data disclosure or modification.
The record
- CVE
- CVE-2025-44011
- Published
- Oct 3, 2025
- Updated
- Oct 3, 2025
- Vendor
- Linn Products Limited
- Product
- Qsync Central
- Classifications
- CWE-476, CAPEC-129, T1499
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Oct 3, 2025CVE publishedPublication date reported by the CVE source.
- Oct 3, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=4.x <5.0.0.1 ( 2025/07/09 )
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo