Description
Duplicati v2.3.0.1 backup software gives Authenticated Users MODIFY permissions that propagate to all subdirectories. Installing the software outside of the Program Files directory, or on a custom path, creates a LocalSystem service running from a directory that any standard local user can write to. A standard local user can overwrite any DLL in the service directory. On service restart, the OS loads the attacker's DLL before any managed code runs, executing arbitrary code as SYSTEM.
Published: 2026-07-22
Score: 7.8 High
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories

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References
History

Mon, 27 Jul 2026 17:30:00 +0000

Type Values Removed Values Added
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Thu, 23 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Duplicati
Duplicati duplicati
Weaknesses CWE-284
CWE-732
Vendors & Products Duplicati
Duplicati duplicati

Wed, 22 Jul 2026 17:45:00 +0000

Type Values Removed Values Added
Description Duplicati v2.3.0.1 backup software gives Authenticated Users MODIFY permissions that propagate to all subdirectories. Installing the software outside of the Program Files directory, or on a custom path, creates a LocalSystem service running from a directory that any standard local user can write to. A standard local user can overwrite any DLL in the service directory. On service restart, the OS loads the attacker's DLL before any managed code runs, executing arbitrary code as SYSTEM.
Title Duplicati backup software v2.3.0.1 is vulnerable to an incorrect permission assignment vulnerability
References

Subscriptions

Duplicati Duplicati
cve-icon MITRE

Status: PUBLISHED

Assigner: certcc

Published:

Updated: 2026-07-27T17:03:37.752Z

Reserved: 2026-07-17T19:45:55.953Z

Link: CVE-2026-16157

cve-icon Vulnrichment

Updated: 2026-07-22T18:25:41.589Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-23T20:37:08Z

Weaknesses
  • CWE-284

    Improper Access Control

  • CWE-732

    Incorrect Permission Assignment for Critical Resource