CVE-2020-28646

Local code execution via development plugin loading

Published Feb 26, 2021 · Updated Aug 4, 2024

DLL injection in ownCloud Desktop Client before 2.7 allows local users to execute code through a planted development plugin. The released client enables development-plugin search paths in production and loads a library from those directories when one is present. Exploitation requires a crafted library in a searched local directory and user interaction that causes the client to load it; the code runs in the client's context.

CVSS severity5.3
Medium
EPSS probability0.77%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

DLL injection in ownCloud Desktop Client before 2.7 allows local users to execute code through a planted development plugin. The released client enables development-plugin search paths in production and loads a library from those directories when one is present. Exploitation requires a crafted library in a searched local directory and user interaction that causes the client to load it; the code runs in the client's context.

The record

CVE
CVE-2020-28646
Published
Feb 26, 2021
Updated
Aug 4, 2024
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-114, CWE-427, T1574.002
Attack vector
local
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 26, 2021CVE publishedPublication date reported by the CVE source.
  2. Aug 4, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectorlocal
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

7.8NIST NVDCVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
4.4NIST NVDAV:L/AC:M/Au:N/C:P/I:P/A:P
5.3ownCloudCVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-114Process Control
CWE-427Uncontrolled Search Path Element
T1574.002DLL Side-Loading

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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