Buffer overflow in Qnap Media Streaming Add-On
CVE-2025-59383
A buffer overflow vulnerability has been reported to affect Media Streaming Add-On. The remote attackers can then exploit the vulnerability to modify memory or crash processes. We have already fixed the vulnerability in the following version: Media Streaming Add-on 500.1.1 and later
Vulnerability class: Buffer Overflow
EPSS: 0.003 (24.2th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H.
Affected products
- Qnap Media_streaming_add-on
- Qnap Systems Inc. Media Streaming Add-on — versions 500.1.x
Weakness classification (CWE)
References
- security@qnapsecurity.com.tw (Vendor Advisory)
Frequently asked questions
- What is CVE-2025-59383?
- CVE-2025-59383 is a critical-severity vulnerability in Qnap Media Streaming Add-On, classified under Stack-based Buffer Overflow. CVSS score: 9.1/10. Published 2026-03-20.
- How severe is CVE-2025-59383?
- Critical severity. CVSS v3 base score is 9.1 out of 10.