# CVE-2017-20218

## Summary

- **CVE ID:** CVE-2017-20218
- **Severity:** HIGH
- **CVSS Score:** 8.5 (CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-428
- **Published:** Mar 15, 2026
- **Last Modified:** Mar 16, 2026

## Description

Serviio PRO 1.8 contains an unquoted search path vulnerability in the Windows service that allows local users to execute arbitrary code with elevated privileges by placing malicious executables in the system root path. Additionally, improper directory permissions with full access for the Users group allow authenticated users to replace the executable file with arbitrary binaries, enabling privilege escalation during service startup or system reboot.

## Affected Products

- Serviio — Serviio PRO (1.8.0.0 PRO)
- Serviio — Serviio PRO (1.7.1)
- Serviio — Serviio PRO (1.7.0)
- Serviio — Serviio PRO (1.6.1)

## References

- [CNA](https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5405.php)
- [CNA](https://blogs.securiteam.com/index.php/archives/3094)
- [CNA](https://www.exploit-db.com/exploits/41959/)
- [CNA](https://packetstormsecurity.com/files/142384)
- [CNA](https://cxsecurity.com/issue/WLB-2017050019)
- [CNA](https://exchange.xforce.ibmcloud.com/vulnerabilities/125644)
- [CNA](https://www.vulncheck.com/advisories/serviio-pro-local-privilege-escalation-via-unquoted-path)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.14%
- **EPSS Percentile:** 3.7

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-10._