CVE-2017-20218
CVE-2017-20218 is a high-severity vulnerability with a CVSS 3.x base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-428.
Key facts
- Severity: High (CVSS 3.x base score 7.8)
- CVSS v4: 8.5
- EPSS exploit prediction: 0% (4th percentile)
- Actively exploited: Not listed in CISA KEV
- EU (EUVD) id: EUVD-2017-18930
- Weakness: CWE-428
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2017-20218?
- 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.
- How severe is CVE-2017-20218?
- CVE-2017-20218 has a CVSS 3.x base score of 7.8, rated high severity. It is exploitable over local access with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2017-20218 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (4th percentile), an estimate of the probability of exploitation in the next 30 days.
- How do I fix CVE-2017-20218?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- Does CVE-2017-20218 have an EU (EUVD) identifier?
- Yes. CVE-2017-20218 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2017-18930.
- When was CVE-2017-20218 published?
- CVE-2017-20218 was published on 2026-03-16 and last updated on 2026-06-17.
References
- https://blogs.securiteam.com/index.php/archives/3094
- https://cxsecurity.com/issue/WLB-2017050019
- https://exchange.xforce.ibmcloud.com/vulnerabilities/125644
- https://packetstormsecurity.com/files/142384
- https://www.exploit-db.com/exploits/41959/
- https://www.vulncheck.com/advisories/serviio-pro-local-privilege-escalation-via-unquoted-path
- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2017-5405.php
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