CVE-2025-48726: several QNAP operating system versions: QTS: NULL pointer dereference vulnerability
This QNAP advisory covers CVE-2025-48726 in QTS 5.2.x and QuTS hero h5.2.x.
- CVE-2025-48726
Key facts
- Vendor rating
- Medium, CVSS 4.9
- CVSS vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N· base score 5.1, scored by qnapAttack vector: network. Attack complexity: low. Attack requirements: none. Privileges required: high. User interaction: none. Confidentiality impact on the vulnerable system: none. Integrity impact on the vulnerable system: none. Availability impact on the vulnerable system: low. Confidentiality impact on subsequent systems: none. Integrity impact on subsequent systems: none. Availability impact on subsequent systems: none.- Weakness
- CWE-476
- EPSS
- 0.47% chance of exploitation in the next 30 days (41st percentile). FIRST EPSS, .
- CISA SSVC
- Exploitation: none observed. Automatable: no. Technical impact: partial. CISA, .
- CISA KEV
- Not listed (catalogue checked )
- Fixed in
- QTS 5.2.6.3195 build 20250715 and later, QuTS hero h5.2.6.3195 build 20250715 and later, QTS 5.2.x
- Source published
- Source revised
- Listed by VulniPulse
Compiled by VulniPulse from the linked sources. How records are collected and checked.
Affected products & platforms
Description
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator account, they can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following versions: QTS 5.2.6.3195 build 20250715 and later
Affected products named by the advisory: QTS 5.2.x; QuTS hero h5.2.x.
Text from the source record.
How to fix CVE-2025-48726
Upgrade to a fixed release named by QNAP:
- QTS 5.2.6.3195 build 20250715 and later
- QuTS hero h5.2.6.3195 build 20250715 and later
- QTS 5.2.x
Vendor guidance
- Update the affected QNAP app / operating system to a fixed release: QTS 5.2.6.3195 build 20250715 and later, QuTS hero h5.2.6.3195 build 20250715 and later, QTS 5.2.x.
End-of-life dates for QNAP QTS
More QNAP advisories
CVE-2025-52863Jan 2, 2026several QNAP operating system versions: QTS: buffer overflow vulnerabilityCVE-2025-52430Jan 2, 2026several QNAP operating system versions: QTS: NULL pointer dereference vulnerabilityCVE-2025-62849Dec 16, 2025several QNAP operating system versions: QTS: SQL injection vulnerabilityCVE-2025-59385Dec 16, 2025several QNAP operating system versions: QTS: authentication bypass by spoofingCVE-2025-52433Oct 3, 2025several QNAP operating system versions: QTS: NULL pointer dereference vulnerabilityCVE-2025-48729Oct 3, 2025several QNAP operating system versions: QTS: NULL pointer dereference vulnerability
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