CVE-2017-20218Public exploit

LocalSystem code execution via unsafe service configuration

Published Mar 15, 2026 · Updated Mar 15, 2026

Unquoted service paths in Serviio Pro 1.6.1, 1.7.0, 1.7.1, and 1.8.0.0 on Windows allow local users to execute code as LocalSystem. The Serviio service registers C:\Program Files\Serviio\bin\ServiioService.exe without quotation marks, while inherited full-control permissions for Users permit replacement of that executable. A low-privileged authenticated local account must place a matching executable in the search path or replace the service binary; execution occurs when the automatic service starts or the host reboots.

CVSS severity8.5
High
EPSS probability0.14%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unquoted service paths in Serviio Pro 1.6.1, 1.7.0, 1.7.1, and 1.8.0.0 on Windows allow local users to execute code as LocalSystem. The Serviio service registers C:\Program Files\Serviio\bin\ServiioService.exe without quotation marks, while inherited full-control permissions for Users permit replacement of that executable. A low-privileged authenticated local account must place a matching executable in the search path or replace the service binary; execution occurs when the automatic service starts or the host reboots.

The record

CVE
CVE-2017-20218
Published
Mar 15, 2026
Updated
Mar 15, 2026
Vendor
Serviio
Product
Serviio Pro
Classifications
CWE-428, T1574.010, T1574.009
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 15, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 15, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.6.1
  2. Affected versionversion=1.7.0
  3. Affected versionversion=1.7.1
  4. Affected versionversion=1.8.0.0 PRO

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

Serviio · Serviio Proversion=1.6.1; version=1.7.0; version=1.7.1; version=1.8.0.0 PRO

Published CVSS scores

8.5VulnCheckCVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
7.8VulnCheckCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectorlocal
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-428Unquoted Search Path or Element
T1574.010Services File Permissions Weakness
T1574.009Path Interception by Unquoted Path

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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