High severity7.8NVD Advisory· Published Oct 8, 2026· Updated Oct 8, 2026
CVE-2026-107782
CVE-2026-107782
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.
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Affected products
1- Range: <4.0.26241.138
Patches
Vulnerability mechanics
References
4- github.com/winsiderss/systeminformer/blob/v3.2.25011.2103/SystemInformer/phsvc/svcapiport.cnvd
- github.com/winsiderss/systeminformer/commit/ce451a264a424f6f386b1615df651f8364aaeb9fnvd
- github.com/winsiderss/systeminformer/releases/tag/v4.0.26241.138nvd
- www.vulncheck.com/advisories/system-informer-before-4.0.26241.138-incorrect-authorization-in-phsvc-alpc-portnvd
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