Vulnerability · Published Jul 22, 2026 · Assigned by certcc
CVE-2026-16157Duplicati backup software v2.3.0.1 is vulnerable to an incorrect permission assignment vulnerability
High 7.8
In plain English
A high-severity incorrect permission assignment in Duplicati from Duplicati. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities).
Official 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.
Affected products (as reported)
Weakness: CWE-732 · Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H