CVE-2025-66277 — Link Following in Systems INC QTS

CWE-59 — Link Following3 documents3 sources
Severity
9.2CRITICALNVD
EPSS
0.1%
top 73.86%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
4
Qnap Systems INC QTSQnap Systems INC Quts HeroQnap QTS+1 more
Timeline
PublishedFeb 11

Description

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

CVSS vector

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

Affected Packages4 packages

▶CVEListV5qnap_systems_inc/quts_heroh5.3.x — h5.3.2.3354 build 20251225+1
▶NVDqnap/quts_hero18 versions+17
▶CVEListV5qnap_systems_inc/qts5.2.x — 5.2.8.3350 build 20251216
▶NVDqnap/qts19 versions+18

🔴Vulnerability Details

2
CVEList
QTS, QuTS hero↗2026-02-11
▶
GHSA
GHSA-3wh2-2wc5-f45w: A link following vulnerability has been reported to affect several QNAP operating system versions↗2026-02-11
▶
CVE-2025-66277 — Link Following in Qnap Systems INC QTS | cvebase