CVE-2016-20055Public exploit

LocalSystem privilege escalation via unquoted service path

Published Apr 4, 2026 · Updated Apr 4, 2026

Unquoted service path handling in IObit Advanced SystemCare 10.0.2 allows local users to execute code with LocalSystem privileges. AdvancedSystemCareService10 registers its executable path under Program Files without quotation marks, causing Windows to resolve an attacker-placed executable earlier in the path. Exploitation requires local file placement and execution occurs when the service restarts or the system reboots.

CVSS severity8.5
High
EPSS probability0.18%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Unquoted service path handling in IObit Advanced SystemCare 10.0.2 allows local users to execute code with LocalSystem privileges. AdvancedSystemCareService10 registers its executable path under Program Files without quotation marks, causing Windows to resolve an attacker-placed executable earlier in the path. Exploitation requires local file placement and execution occurs when the service restarts or the system reboots.

The record

CVE
CVE-2016-20055
Published
Apr 4, 2026
Updated
Apr 4, 2026
Vendor
IObit
Product
Advanced SystemCare
Classifications
CWE-428, T1574.009
Attack vector
local
Privileges
authenticated

Timeline

How it unfolded

  1. Apr 4, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 4, 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=10.0.2

What conditions does exploitation require?

Attack vectorlocal
Required privilegesauthenticated

What is affected?

IObit · Advanced SystemCareversion=10.0.2

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.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 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
T1574.009Hijack Execution Flow: Path Interception by Unquoted Path

Public exploit references

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Technologies

Your stack

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Your stack

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