VU#847406: Duplicati backup software v2.3.0.1 is vulnerable to an incorrect permission assignment vulnerability

Summary

Overview Duplicati v2.3.0.1 is vulnerable to arbitrary code execution when installed outside the default C:\Program Files\Duplicati 2\ directory. An attacker with local user privileges who can write files to the Duplicati installation directory can execute arbitrary code by placing malicious files, such as DLLs, in that directory. To mitigate this vulnerability, install Duplicati in the default C:\Program Files\ directory or update to the latest fixed version. Description Duplicati is a free, open-source backup solution that stores data across cloud and local storage platforms. On Windows, Duplicati is distributed as an MSI installer. By default, the installer deploys the application to C:\Program Files\Duplicati 2\ , where the directory inherits the standard protected ACLs provided by Windows. The following vulnerability affects... Related CVEs: CVE-2026-16157.

Why it matters

CERT/CC notes often cover coordinated disclosures, multi-vendor exposure, infrastructure risk, or cases where remediation guidance is still developing.

Operator check

Review the CERT/CC Vulnerability Note and compare the affected vendor and product list against your inventory. Apply vendor fixes or compensating controls for backup software v2.3.0.1 where available.

Sources