How severe is CVE-2021-34360?

CVE-2021-34360 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-34360 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-34360?

CVE-2021-34360 affects Qnap Nas Proxy Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-34360?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2021-34360 published?

CVE-2021-34360 was published on 2022-05-26 and last updated on 2026-06-17.

CVE-2021-34360

CVE-2021-34360 is a medium-severity vulnerability in Qnap Nas Proxy Server with a CVSS 3.x base score of 5.3. 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-352.

Key facts

Severity: Medium (CVSS 3.x base score 5.3)
CVSS v2: 6.8
EPSS exploit prediction: 0% (35th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-352
Affected product: Qnap Nas Proxy Server
Published: 2022-05-26
Last modified: 2026-06-17

Description

A cross-site request forgery (CSRF) vulnerability has been reported to affect QNAP device running Proxy Server. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of Proxy Server: QTS 4.5.x: Proxy Server 1.4.2 ( 2021/12/30 ) and later QuTS hero h5.0.0: Proxy Server 1.4.3 ( 2022/01/18 ) and later QuTScloud c4.5.6: Proxy Server 1.4.2 ( 2021/12/30 ) and later

Frequently asked questions

What is CVE-2021-34360?: A cross-site request forgery (CSRF) vulnerability has been reported to affect QNAP device running Proxy Server. If exploited, this vulnerability allows remote attackers to inject malicious code. We have already fixed this vulnerability in the following versions of Proxy Server: QTS 4.5.x: Proxy Server 1.4.2 ( 2021/12/30 ) and later QuTS hero h5.0.0: Proxy Server 1.4.3 ( 2022/01/18 ) and later QuTScloud c4.5.6: Proxy Server 1.4.2 ( 2021/12/30 ) and later
How severe is CVE-2021-34360?: CVE-2021-34360 has a CVSS 3.x base score of 5.3, rated medium severity. It is exploitable over network with high attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-34360 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (35th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-34360?: CVE-2021-34360 affects Qnap Nas Proxy Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-34360?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2021-34360 published?: CVE-2021-34360 was published on 2022-05-26 and last updated on 2026-06-17.

References

https://www.qnap.com/en/security-advisory/qsa-22-18

Affected products (1)

cpe:2.3:a:qnap:nas_proxy_server:*:*:*:*:*:*:*:*

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