CVE-2025-66274

published 2026-02-11

CVE-2025-66274: A NULL pointer dereference vulnerability has been reported to affect several QNAP operating system versions. If a remote attacker gains an administrator…

Priority P4 25 medium 4.9 CVSS 3.1

AV N AC L PR H UI N S U C N I N A H

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 5.2.9.3410 build 20260214 and later
QuTS hero h5.2.9.3410 build 20260214 and later
QuTS hero h5.3.2.3354 build 20251225 and later
QuTS hero h6.0.0.3397 build 20260206 and later

Affected

9 ranges

Vendor	Product	Version range	Fixed in
qnap	quts_hero	—	—
qnap	quts_hero	—	—
qnap	quts_hero	—	—
qnap	quts_hero	—	—
qnap	quts_hero	—	—
qnap_systems_inc	qts	>= 5.2.0 < 5.2.9.3410 build 20260214	5.2.9.3410 build 20260214
qnap_systems_inc	quts_hero	>= ? < h6.0.0.3397 build 20260206	h6.0.0.3397 build 20260206
qnap_systems_inc	quts_hero	>= h5.2.0 < h5.2.9.3410 build 20260214	h5.2.9.3410 build 20260214
qnap_systems_inc	quts_hero	>= h5.3.0 < h5.3.2.3354 build 20251225	h5.3.2.3354 build 20251225

CVSS provenance

nvd v3.1 4.9 MEDIUM CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:N/A:H

nvd v4.0 5.1 MEDIUM CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

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