CVE-2021-44052

Arbitrary file read

HIGH

8.1

CVSS Score

Published: May 5, 2022 at 04:50 PM UTC

Updated: June 17, 2026 at 04:11 AM UTC

3 products affected across 1 vendorQTSQuTS heroQuTScloud

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Severity

HIGH8.1

Exploit prediction

EPSS 2%

Description

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

QTS · Qnap

95%

v < 4.2.6 build 20220304v < 4.3.3.1945 build 20220303v < 4.3.4.1976 build 20220303v < 4.3.6.1965 build 20220302v < 4.5.4.1991 build 20220329v < 5.0.0.1986 build 202203244.3.3.0174 ≤ v < 4.3.3.19454.3.4.0899 ≤ v < 4.3.4.19764.3.6.0895 ≤ v < 4.3.6.19654.4.0.0883 ≤ v < 4.5.4.19915.0.0.1716 ≤ v < 5.0.0.19864.2.6 build_20170517 4.2.6 build_20190322 4.2.6 build_20190730 4.2.6 build_20190921 4.2.6 build_20191107 4.2.6 build_20200109 4.2.6 build_20200421 4.2.6 build_20200611 4.2.6 build_20200821 4.2.6 build_20210327 4.2.6 build_20211215

Affected range stops below 4.2.6 build 20220304, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.3.3.1945, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.3.3.1945 build 20220303, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.3.4.1976, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.3.4.1976 build 20220303, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.3.6.1965, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.3.6.1965 build 20220302, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.5.4.1991, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.5.4.1991 build 20220329, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.0.0.1986, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.0.0.1986 build 20220324, so it looks safe — our inference, not a vendor statement

QuTS hero · Qnap

95%

v < h4.5.4.1771v < h4.5.4.1971 build 20220310v < h5.0.0.1986 build 20220324h5.0.0.1772 ≤ v < h5.0.0.1986

Affected range stops below h4.5.4.1771, so it looks safe — our inference, not a vendor statement

Affected range stops below h4.5.4.1971 build 20220310, so it looks safe — our inference, not a vendor statement

Affected range stops below h5.0.0.1986, so it looks safe — our inference, not a vendor statement

Affected range stops below h5.0.0.1986 build 20220324, so it looks safe — our inference, not a vendor statement

QuTScloud · Qnap

95%

v < c5.0.1.1998

Affected range stops below c5.0.1.1998, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://www.qnap.com/en/security-advisory/qsa-22-16

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://www.qnap.com/en/security-advisory/qsa-22-16

CVSS

8.1HIGH[email protected]

Attack Vector: NETWORK
Complexity: LOW
Privileges: LOW
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: HIGH
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-59

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