What’s Vulnerable › Vulnerabilities

CVE-2026-107782: System Informer before 4.0.26241.138 Incorrect Authorization in phsvc ALPC Port

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.1% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-08 · updated 2026-10-14
• Weakness: CWE-863

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.

Affected products

• winsiderss System Informer: before 4.0.26241.138 — fixed in 4.0.26241.138

How to fix

Upgrade to a fixed version: winsiderss System Informer 4.0.26241.138. Check the vendor advisory for mitigations.

References

• https://github.com/winsiderss/systeminformer
• https://github.com/winsiderss/systeminformer/blob/v3.2.25011.2103/SystemInformer/phsvc/svcapiport.c#L196-L230
• https://github.com/winsiderss/systeminformer/commit/ce451a264a424f6f386b1615df651f8364aaeb9f
• https://github.com/winsiderss/systeminformer/releases/tag/v4.0.26241.138
• https://www.vulncheck.com/advisories/system-informer-before-4.0.26241.138-incorrect-authorization-in-phsvc-alpc-port

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