How severe is CVE-2021-38688?

CVE-2021-38688 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-38688 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-38688?

CVE-2021-38688 affects Qnap Qfile. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-38688?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2021-38688 published?

CVE-2021-38688 was published on 2021-12-29 and last updated on 2026-06-17.

CVE-2021-38688

CVE-2021-38688 is a high-severity vulnerability in Qnap Qfile with a CVSS 3.x base score of 7.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-287.

Key facts

Severity: High (CVSS 3.x base score 7.1)
CVSS v2: 5.0
EPSS exploit prediction: 1% (53rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-287
Affected product: Qnap Qfile
Published: 2021-12-29
Last modified: 2026-06-17

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

Frequently asked questions

What is CVE-2021-38688?: 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
How severe is CVE-2021-38688?: CVE-2021-38688 has a CVSS 3.x base score of 7.1, rated high severity. It is exploitable over an adjacent network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-38688 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (53rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-38688?: CVE-2021-38688 affects Qnap Qfile. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-38688?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2021-38688 published?: CVE-2021-38688 was published on 2021-12-29 and last updated on 2026-06-17.

References

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

Affected products (1)

cpe:2.3:a:qnap:qfile:*:*:*:*:*:android:*:*

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