How severe is CVE-2021-34352?

CVE-2021-34352 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2021-34352 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34352?

CVE-2021-34352 affects Qnap Qvr. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34352?

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-2021-34352 published?

CVE-2021-34352 was published on 2021-10-01 and last updated on 2026-06-17.

CVE-2021-34352

CVE-2021-34352 is a high-severity vulnerability in Qnap Qvr with a CVSS 3.x base score of 7.2. 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-77.

Key facts

Severity: High (CVSS 3.x base score 7.2)
CVSS v2: 7.5
EPSS exploit prediction: 1% (71st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-77
Affected product: Qnap Qvr
Published: 2021-10-01
Last modified: 2026-06-17

Description

A command injection vulnerability has been reported to affect QNAP device running QVR. If exploited, this vulnerability could allow remote attackers to run arbitrary commands. We have already fixed this vulnerability in the following versions of QVR: QVR 5.1.5 build 20210902 and later

Frequently asked questions

What is CVE-2021-34352?: A command injection vulnerability has been reported to affect QNAP device running QVR. If exploited, this vulnerability could allow remote attackers to run arbitrary commands. We have already fixed this vulnerability in the following versions of QVR: QVR 5.1.5 build 20210902 and later
How severe is CVE-2021-34352?: CVE-2021-34352 has a CVSS 3.x base score of 7.2, rated high severity. It is exploitable over network with low attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2021-34352 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (71st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34352?: CVE-2021-34352 affects Qnap Qvr. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34352?: 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-2021-34352 published?: CVE-2021-34352 was published on 2021-10-01 and last updated on 2026-06-17.

References

https://www.qnap.com/en/security-advisory/qsa-21-38

Affected products (1)

cpe:2.3:a:qnap:qvr:*:*:*:*:*:*:*:*

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