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CVE-2025-59383

QNAP Media Streaming Add-on buffer overflow

9.1 CRITICALEPSS 0.32%
  1. Published20 Mar 2026

Description

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

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityHigh
AvailabilityHigh
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< 500.1.1.0

Remediation

Fixed in
QNAP Media Streaming Add-on≥ 500.1.1.0

References

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Frequently asked

Is CVE-2025-59383 being actively exploited?

CVE-2025-59383 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.32%.

How severe is CVE-2025-59383?

CVE-2025-59383 has a CVSS 3.1 base score of 9.1, rated critical. EPSS estimates a 0.32% probability of exploitation.

Which products are affected by CVE-2025-59383?

Affected products include QNAP Media Streaming Add-on.

How do I fix CVE-2025-59383?

Upgrade affected software to a fixed version, for example QNAP Media Streaming Add-on 500.1.1.0 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-59383 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.