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CVE-2026-16157— Duplicati backup software v2.3.0.1 is vulnerable to an incorrect permission assignment vulnerability

Quick assessment

Affected
Duplicati Duplicati
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Duplicati Duplicati是Duplicati公司的一款文件管理网络存储软件。 Duplicati 2.3.0.1版本存在权限许可和访问控制问题漏洞，该漏洞源于安装到Program Files目录之外或自定义路径时，给已验证用户分配了传播到所有子目录的MODIFY权限，可能导致标准本地用户在服务目录中覆盖任何DLL，并在服务重启时以SYSTEM权限执行任意代码。

AI Predicted 8.8 Difficulty: Easy EPSS 0.12% · P2

Possible ATT&CK Techniques 2 AI

T1055 · Process Injection T1574.001 · DLL

Affected Version Matrix 1

VendorProduct Version RangeStatus
Duplicati Duplicati 2.3.0.1 affected
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I. Basic Information for CVE-2026-16157

Vulnerability Information
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Vulnerability Title
Duplicati backup software v2.3.0.1 is vulnerable to an incorrect permission assignment vulnerability
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
N/A
Source: CVE Program / CVE List V5
Vulnerability Title
Duplicati 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Duplicati Duplicati是Duplicati公司的一款文件管理网络存储软件。 Duplicati 2.3.0.1版本存在权限许可和访问控制问题漏洞，该漏洞源于安装到Program Files目录之外或自定义路径时，给已验证用户分配了传播到所有子目录的MODIFY权限，可能导致标准本地用户在服务目录中覆盖任何DLL，并在服务重启时以SYSTEM权限执行任意代码。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Duplicati Duplicati 2.3.0.1 -

II. Public POCs for CVE-2026-16157

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III. Intelligence Information for CVE-2026-16157

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Vendor Advisories for CVE-2026-16157 (1)

IV. Related Vulnerabilities

Same product: Duplicati
Same vendor: Duplicati

V. Comments for CVE-2026-16157

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