CVE-2025-52870

0.6 LOW 0.4% exploit odds Fix listed Memory safety

What it is

A buffer overflow vulnerability has been reported to affect Qsync Central. If a remote attacker gains a user account, they can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: Qsync Central 5.0.0.4 ( 2026/01/20 ) and later

At a glance

Exploitability: Can be exploited over the network with a low-privilege account. Limited direct impact.
Exploit odds: 0.4% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-02-11 13:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-06-17 09:37 UTC Last updatedMost recent change to the record

Details

Published: 2026-02-11 13:15 UTC
Last modified: 2026-06-17 09:37 UTC
Exploit probability: 0.4% · EPSS, next 30 days
Weakness: CWE-120 · Classic buffer overflow
Record status: Analyzed

Affected

Qnap Qsync Central < 5.0.0.4

Attack profile CVSS 4.0 · 0.6

Attack vector: Network
Complexity: Low
Attack requirements: Present
Privileges needed: Low
User interaction: None
Confidentiality: None
Integrity: None
Availability: Low

Raw vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/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

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Fix and advisories

https://www.qnap.com/en/security-advisory/qsa-26-02

References

https://www.qnap.com/en/security-advisory/qsa-26-02

NVD record · CVE.org record