How severe is CVE-2021-28810?

CVE-2021-28810 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.

Is CVE-2021-28810 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2021-28810?

CVE-2021-28810 affects Qnap Roon Server. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2021-28810?

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-2021-28810 published?

CVE-2021-28810 was published on 2021-06-08 and last updated on 2026-06-17.

CVE-2021-28810

CVE-2021-28810 is a high-severity vulnerability in Qnap Roon Server with a CVSS 3.x base score of 7.5. 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-290.

Key facts

Severity: High (CVSS 3.x base score 7.5)
CVSS v2: 5.0
EPSS exploit prediction: 1% (60th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-290
Affected product: Qnap Roon Server
Published: 2021-06-08
Last modified: 2026-06-17

Description

If exploited, this vulnerability allows an attacker to access resources which are not otherwise accessible without proper authentication. Roon Labs has already fixed this vulnerability in the following versions: Roon Server 2021-05-18 and later

Frequently asked questions

What is CVE-2021-28810?: If exploited, this vulnerability allows an attacker to access resources which are not otherwise accessible without proper authentication. Roon Labs has already fixed this vulnerability in the following versions: Roon Server 2021-05-18 and later
How severe is CVE-2021-28810?: CVE-2021-28810 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity none, and availability none.
Is CVE-2021-28810 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (60th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2021-28810?: CVE-2021-28810 affects Qnap Roon Server. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2021-28810?: 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-2021-28810 published?: CVE-2021-28810 was published on 2021-06-08 and last updated on 2026-06-17.

References

https://www.qnap.com/zh-tw/security-advisory/qsa-21-17

Affected products (1)

cpe:2.3:a:qnap:roon_server:*:*:*:*:*:*:*:*

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