Vulnerability · Published Jan 2, 2026 · Assigned by qnap

CVE-2025-53590QTS

Low 1.2

In plain English

A low-severity null pointer dereference in QTS from QNAP Systems Inc.. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 30% of all known vulnerabilities).

Severity (CVSS 4.0)1.2Low

Exploit odds (30 days)0.4%top 70.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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 version: QTS 5.2.7.3256 build 20250913 and later

Affected products (as reported)

Vendor	Product	Versions
QNAP Systems Inc.	QTS	5.2.x – before 5.2.7.3256 build 20250913

Weakness: CWE-476 · 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/E:U

References

https://www.qnap.com/en/security-advisory/qsa-25-50