CVE-2021-38688: Improper Authentication in Qfile

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-12-29 · updated 2026-06-17
Weakness: CWE-287

Description

An improper authentication vulnerability has been reported to affect Android App Qfile. If exploited, this vulnerability allows attackers to compromise app and access information We have already fixed this vulnerability in the following versions of Qfile: Qfile 3.0.0.1105 and later

Affected products

QNAP Systems Inc. Qfile: before 3.0.0.1105 — fixed in 3.0.0.1105

How to fix

Upgrade to a fixed version: QNAP Systems Inc. Qfile 3.0.0.1105. Check the vendor advisory for mitigations.

References

https://www.qnap.com/en/security-advisory/qsa-21-55
https://www.qnap.com/en/security-advisory/qsa-21-55

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