CVE-2026-76159: Duplicati for Windows - Incorrect Permission Assignment for Critical Resource

Severity: high (CVSS 7.0 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.1% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-15 · updated 2026-09-16
Weakness: CWE-732

Description

Incorrect Permission Assignment for Critical Resource in the configuration loader of Duplicati for Windows versions before v2.4.0.0 allows a local low-privileged attacker to escalate privileges to NT AUTHORITY\SYSTEM via an attacker-controlled preload.json file.

Affected products

Duplicati: before v2.4.0.0 — fixed in v2.4.0.0

How to fix

Upgrade to a fixed version: Duplicati v2.4.0.0. Check the vendor advisory for mitigations.

References

https://zuso.ai/advisory/

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