by Kastro
Paper/Archive/CVE-2025-66277

CVE-2025-66277

QNAP Systems Inc. QTS — QTS, QuTS hero

EPSS 0.7%CVSS 9.8
critical.is priorityof 100
40
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 53.6.536 × 2010.7No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

A link following vulnerability has been reported to affect several QNAP operating system versions. The remote attackers can then exploit the vulnerability to traverse the file system to unintended locations. We have already fixed the vulnerability in the following versions: QTS 5.2.8.3350 build 20251216 and later QuTS hero h5.3.2.3354 build 20251225 and later QuTS hero h5.2.8.3350 build 20251216 and later

Affected

ProductAffectedFixed inSource
QTS5.2.x – < 5.2.8.3350 build 202512165.2.8.3350 build 20251216CNA
QuTS heroh5.3.x – < h5.3.2.3354 build 20251225h5.3.2.3354 build 20251225CNA
QuTS heroh5.2.x – < h5.2.8.3350 build 20251216h5.2.8.3350 build 20251216CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
qnap (CNA)9.2CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: total

References

refqnap.com/en/security-advisory/qsa-26-05