CVE-2021-44052 json
Arbitrary file read
published 2022-05-05 4 y ago modified 2026-06-17 4 mo ago also EUVD-2021-30911
- cvss
- 6.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.6%
- EPSS 1.6% chance of exploitation in 30 days, percentile 75%
- public exploits
- 0
- none known
Summary
An improper link resolution before file access ('Link Following') vulnerability has been reported to affect QNAP device running QuTScloud, QuTS hero, and QTS. If exploited, this vulnerability allows remote attackers to traverse the file system to unintended locations and read or overwrite the contents of unexpected files. We have already fixed this vulnerability in the following versions of QuTScloud, QuTS hero, and QTS: QuTScloud c5.0.1.1998 and later QuTS hero h4.5.4.1971 build 20220310 and later QuTS hero h5.0.0.1986 build 20220324 and later QTS 4.3.4.1976 build 20220303 and later QTS 4.3.3.1945 build 20220303 and later QTS 4.2.6 build 20220304 and later QTS 4.3.6.1965 build 20220302 and later QTS 5.0.0.1986 build 20220324 and later QTS 4.5.4.1991 build 20220329 and later
Patch / fix
- QNAP Systems Inc. QuTScloud c5.0.1.1998
- QNAP Systems Inc. QuTS hero h4.5.4.1971 build 20220310, h5.0.0.1986 build 20220324
- QNAP Systems Inc. QTS 4.2.6 build 20220304, 4.3.3.1945 build 20220303, 4.3.4.1976 build 20220303, 4.3.6.1965 build 20220302, 4.5.4.1991 build 20220329, 5.0.0.1986 build 20220324
Exploit prediction
1.59% chance of exploitation in the next 30 days, higher than 75% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 6.5 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N |
| NVD | 3.1 | 8.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N |
| NVD | 2.0 | 5.5 | AV:N/AC:L/Au:S/C:P/I:P/A:N |
Affected products
- QNAP Systems Inc. QuTScloud
- QNAP Systems Inc. QuTS hero
- QNAP Systems Inc. QTS
Classification
- Weakness
-
- CWE-59 Improper Link Resolution Before File Access
References
-
qnap.com
/en/security-advisory/qsa-22-16
vendor-advisory
Sources
- CVE List CVE-2021-44052
- NVD CVE-2021-44052
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