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Critical 9.2Published Jun 9, 2026

CVE-2025-66276QTS

Updated under an hour ago ()

Does this affect you?

It affects QNAP Systems Inc. QTS and 2 other products. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

QuTS hero is not affected. We have already fixed the vulnerability in the following version: QTS 5.2.7.3256 build 20250913 and later

CVSS
9.2 CRITICAL (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Weakness (CWE)
Not given
Known exploited
Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days)
Not loaded for this CVE
Assigned by
qnap
NVD analysis
Analyzed
Record last updated
Jun 10, 2026
First seen by InfoSec Signals
Oct 9, 2026

Affected products

Affected products
QNAP Systems Inc. QTS
qnap_systems:qts (from the name)
from 5.2.0 before 5.2.7.3256 build 20250913
CNA record
QNAP Systems Inc. QuTS hero
qnap_systems:quts_hero (from the name)
? not affected
CNA record
qnap qts
qnap:qts
from 4.3.0 before 5.2.7.3256
NVD

References

References

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.

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