High severity · published Dec 16, 2025
CVE-2025-62848
QTS, QuTS hero
7.5
CVSS
0.9%
EPSS
No
On KEV
Description
A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to launch a denial-of-service (DoS) attack.
We have already fixed the vulnerability in the following versions:
QTS 5.2.7.3297 build 20251024 and later
QuTS hero h5.2.7.3297 build 20251024 and later
QuTS hero h5.3.1.3292 build 20251024 and later
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.9% · higher than 58% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
QT
QTS · QNAP Systems Inc.
5.2.x before 5.2.7.3297 build 20251024 · source: vendor, NVD
QH
QuTS hero · QNAP Systems Inc.
h5.2.x before h5.2.7.3297 build 20251024; h5.3.x before h5.3.1.3292 build 20251024 · source: vendor, NVD
In the news
VulnerabilityMedium
ZDI-26-199: (Pwn2Own) QNAP TS-453E conn_log_tool Format String Remote Code Execution Vulnerability
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of QNAP TS-453E devices. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The ZDI has assigned a CVSS rating of 5.5. The following CVEs are assigned: CVE-2025-62848.
Mar 16, 2026·Zero Day Initiative
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-62848
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-62848
Vendor Advisory
https://www.qnap.com/en/security-advisory/qsa-25-45
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QuTS hero is not affected