CVE-2026-107782

System Informer before 4.0.26241.138 Incorrect Authorization in phsvc ALPC Port

Published Oct 8, 2026 CVSS 4.0 · 8.5 High EPSS < 1% KEV · Not listed
Description
System Informer before 4.0.26241.138 contains an incorrect authorization vulnerability in the phsvc helper that allows local attackers to reach privileged APIs by connecting from any Authenticode-signed process. Attackers can load code into a Microsoft-signed host like rundll32.exe, connect to SiSvcApiPort, and call PhSvcApiCreateService to execute code as SYSTEM.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
First Time appeared Winsiderss
Winsiderss system Informer
Vendors & Products Winsiderss
Winsiderss system Informer
Type Values Removed Values Added
Description System Informer before 4.0.26241.138 contains an incorrect authorization vulnerability in the phsvc helper that allows local attackers to reach privileged APIs by connecting from any Authenticode-signed process. Attackers can load code into a Microsoft-signed host like rundll32.exe, connect to SiSvcApiPort, and call PhSvcApiCreateService to execute code as SYSTEM.
Title System Informer before 4.0.26241.138 Incorrect Authorization in phsvc ALPC Port
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 7.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 8.5, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
VulnCheck
Published
Updated
Oct 14, 2026, 1:19 AM
Reserved
Oct 8, 2026, 8:02 PM
Status
Awaiting Analysis
Published
Oct 8, 2026, 9:17 PM
Modified
Oct 14, 2026, 2:16 AM