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CVE-2026-107782

7.8 · HIGH

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-s…

Published Oct 8, 2026CWE-863EPSS 0.11%

Overview

CVE-2026-107782 is a high-severity vulnerability. It was published on October 8, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/winsiderss/systeminformerGitHubgithub.com/winsiderss/systeminformer/blob/v3.2.25011.2103/SystemInformer/phsvc/svcapiport.c#L196-L230GitHubgithub.com/winsiderss/systeminformer/commit/ce451a264a424f6f386b1615df651f8364aaeb9fGitHubgithub.com/winsiderss/systeminformer/releases/tag/v4.0.26241.138Refwww.vulncheck.com/advisories/system-informer-before-4.0.26241.138-incorrect-authorization-in-phsvc-alpc-port

How CyberStrike helps

Frequently asked questions

What is CVE-2026-107782?

CVE-2026-107782 is a high-severity vulnerability. It was published on October 8, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-107782?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-107782?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-107782?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-107782 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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