CVE-2020-28646: ownCloud owncloud/client before 2.7 allows DLL Injection

Q: How do I fix CVE-2020-28646?

owncloud desktop client: upgrade to 2.7. Exact commands for each OS are on this page.

Q: Is CVE-2020-28646 being exploited?

CVE-2020-28646 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2020-28646 affect?

CVE-2020-28646 affects owncloud desktop client. Severity is high (CVSS 7.8). ownCloud owncloud/client before 2.7 allows DLL Injection. The desktop client loaded development plugins from certain directories when they were present.

This month

HIGH 7.8UPGRADE

CVE-2020-28646 is a high-severity flaw (CVSS 7.8) affecting owncloud desktop client. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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

Why this priority

High severity

A fixed release or distro patch exists.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	0.8% (top 44%)
CISA exploited list	No
Weakness	CWE-427
Published	2021-02-26
Last modified	2026-06-17

Publisher (CNA): MITRE · Vendor: owncloud

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-02-26 15:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

owncloud owncloud desktop client UPGRADE

Affected: < 2.7

Fixed in: 2.7

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy owncloud-desktop-client || rpm -q owncloud-desktop-client || owncloud-desktop-client --version

2. UPGRADE to 2.7 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade owncloud-desktop-client

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade owncloud-desktop-client

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-28646?

owncloud desktop client: upgrade to 2.7. Exact commands for each OS are on this page.

Is CVE-2020-28646 being exploited?

CVE-2020-28646 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-28646 affect?

CVE-2020-28646 affects owncloud desktop client. Severity is high (CVSS 7.8). ownCloud owncloud/client before 2.7 allows DLL Injection. The desktop client loaded development plugins from certain directories when they were present.

How urgent is CVE-2020-28646?

Priority 41/100. High severity

Software pages

ownCloud vulnerabilities

Related CVEs

CVE-2021-44537 HIGH 7.8 UPGRADE MITIGATE ownCloud owncloud/client before 2.9.2 allows Resource Injection by a server into the desktop client via a URL,
CVE-2016-7102 HIGH 8.4 UPGRADE ownCloud Desktop before 2.2.3 allows local users to execute arbitrary code and possibly gain privileges via a
CVE-2015-7298 MEDIUM 5.1 UPGRADE DOWNGRADE ownCloud Desktop Client before 2.0.1, when compiled with a Qt release after 5.3.x, does not call QNetworkReply
CVE-2015-4456 LOW 2.6 UPGRADE ownCloud Desktop Client before 1.8.2 does not call QNetworkReply::ignoreSslErrors with the list of errors to b

References

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