---
id: CVE-2026-107782
title: >-
  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
summary: >-
  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 i…
severity: high
cvss: 7.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H'
cwe:
  - CWE-863
published: '2026-10-08'
updated: '2026-10-14'
sourceUpdated: '2026-10-14T02:16:58.353'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107782'
references:
  - url: 'https://github.com/winsiderss/systeminformer'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/winsiderss/systeminformer/blob/v3.2.25011.2103/SystemInformer/phsvc/svcapiport.c#L196-L230
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/winsiderss/systeminformer/commit/ce451a264a424f6f386b1615df651f8364aaeb9f
    label: disclosure@vulncheck.com
  - url: 'https://github.com/winsiderss/systeminformer/releases/tag/v4.0.26241.138'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/system-informer-before-4.0.26241.138-incorrect-authorization-in-phsvc-alpc-port
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00115
epssPercentile: 0.01528
ingestedAt: '2026-10-08T22:11:53.859Z'
vendor: winsiderss
product: System Informer
affected:
  - system_informer < 4.0.26241.138
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-10-14T01:19:38.922146Z'
---

## Overview

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

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.