How severe is CVE-2020-28646?

CVE-2020-28646 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-28646 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-28646?

CVE-2020-28646 affects Owncloud Owncloud Desktop Client. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-28646?

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-2020-28646 published?

CVE-2020-28646 was published on 2021-02-26 and last updated on 2026-06-17.

CVE-2020-28646

CVE-2020-28646 is a high-severity vulnerability in Owncloud Owncloud Desktop Client with a CVSS 3.x base score of 7.8. 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-427.

Key facts

Severity: High (CVSS 3.x base score 7.8)
CVSS v2: 4.4
EPSS exploit prediction: 1% (51st percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-427
Affected product: Owncloud Owncloud Desktop Client
Published: 2021-02-26
Last modified: 2026-06-17

Description

ownCloud owncloud/client before 2.7 allows DLL Injection. The desktop client loaded development plugins from certain directories when they were present.

Frequently asked questions

What is CVE-2020-28646?: ownCloud owncloud/client before 2.7 allows DLL Injection. The desktop client loaded development plugins from certain directories when they were present.
How severe is CVE-2020-28646?: CVE-2020-28646 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires no privileges and user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-28646 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (51st percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-28646?: CVE-2020-28646 affects Owncloud Owncloud Desktop Client. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-28646?: 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-2020-28646 published?: CVE-2020-28646 was published on 2021-02-26 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:owncloud:owncloud_desktop_client:*:*:*:*:*:*:*:*

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