CVE-2026-107782 (GCVE-0-2026-107782)

Vulnerability from cvelistv5 – Published: 2026-10-08 20:15 – Updated: 2026-10-08 20:15
VLAI
Title
System Informer before 4.0.26241.138 Incorrect Authorization in phsvc ALPC Port
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 into a Microsoft-signed host like rundll32.exe, connect to SiSvcApiPort, and call PhSvcApiCreateService to execute code as SYSTEM.
Severity
8.5 (High)
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
7.8 (High)
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-863 - Incorrect Authorization
Assigner
VulnCheck CNA under the mitre root
CNA scorecard B 84/100 over 5277 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
winsiderss System Informer Affected: 0 , < 4.0.26241.138 (custom)
Unaffected: 4.0.26241.138 (custom)
guessed Create a notification for this product.
Date Public
2026-08-28 00:00
Credits
Muhammad Ali
Show details on NVD website
To clipboard 

{
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        {
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          "defaultStatus": "unaffected",
          "packageURL": "pkg:github/winsiderss/systeminformer",
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              "status": "affected",
              "version": "0",
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            }
          ]
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      ],
      "credits": [
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          "type": "finder",
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        }
      ],
      "metrics": [
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            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "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",
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            "vulnIntegrityImpact": "HIGH"
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            "confidentialityImpact": "HIGH",
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            "version": "3.1"
          },
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      ],
      "problemTypes": [
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          "descriptions": [
            {
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              "description": "Incorrect Authorization",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-08T20:15:56.603Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
      "references": [
        {
          "name": "Patch Commit",
          "tags": [
            "patch"
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          "url": "https://github.com/winsiderss/systeminformer/commit/ce451a264a424f6f386b1615df651f8364aaeb9f"
        },
        {
          "tags": [
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          "url": "https://github.com/winsiderss/systeminformer/blob/v3.2.25011.2103/SystemInformer/phsvc/svcapiport.c#L196-L230"
        },
        {
          "name": "System Informer v4.0.26241.138 Release Notes",
          "tags": [
            "release-notes"
          ],
          "url": "https://github.com/winsiderss/systeminformer/releases/tag/v4.0.26241.138"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://github.com/winsiderss/systeminformer"
        },
        {
          "name": "VulnCheck Advisory: System Informer before 4.0.26241.138 Incorrect Authorization in phsvc ALPC Port",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/system-informer-before-4.0.26241.138-incorrect-authorization-in-phsvc-alpc-port"
        }
      ],
      "title": "System Informer before 4.0.26241.138 Incorrect Authorization in phsvc ALPC Port",
      "x_generator": {
        "engine": "vulncheck-endgame"
      }
    }
  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-107782",
    "datePublished": "2026-10-08T20:15:56.603Z",
    "dateReserved": "2026-10-08T20:02:31.398Z",
    "dateUpdated": "2026-10-08T20:15:56.603Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
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      "date": "2026-10-09",
      "epss": "0.00115",
      "percentile": "0.01437"
    },
    "nvd": {
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                    "version": "0",
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                    "versionType": "custom"
                  }
                ]
              }
            ],
            "source": "disclosure@vulncheck.com"
          }
        ],
        "cveTags": [],
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          {
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            "value": "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."
          }
        ],
        "id": "CVE-2026-107782",
        "lastModified": "2026-10-08T21:34:48.800",
        "metrics": {
          "cvssMetricV31": [
            {
              "cvssData": {
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                "attackVector": "LOCAL",
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              "source": "disclosure@vulncheck.com",
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            }
          ],
          "cvssMetricV40": [
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              "cvssData": {
                "Automatable": "NOT_DEFINED",
                "Recovery": "NOT_DEFINED",
                "Safety": "NOT_DEFINED",
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                "exploitMaturity": "NOT_DEFINED",
                "integrityRequirement": "NOT_DEFINED",
                "modifiedAttackComplexity": "NOT_DEFINED",
                "modifiedAttackRequirements": "NOT_DEFINED",
                "modifiedAttackVector": "NOT_DEFINED",
                "modifiedPrivilegesRequired": "NOT_DEFINED",
                "modifiedSubAvailabilityImpact": "NOT_DEFINED",
                "modifiedSubConfidentialityImpact": "NOT_DEFINED",
                "modifiedSubIntegrityImpact": "NOT_DEFINED",
                "modifiedUserInteraction": "NOT_DEFINED",
                "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
                "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
                "modifiedVulnIntegrityImpact": "NOT_DEFINED",
                "privilegesRequired": "LOW",
                "providerUrgency": "NOT_DEFINED",
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                "valueDensity": "NOT_DEFINED",
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        "published": "2026-10-08T21:17:53.227",
        "references": [
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            "source": "disclosure@vulncheck.com",
            "url": "https://github.com/winsiderss/systeminformer"
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            "source": "disclosure@vulncheck.com",
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      }
    }
  }
}



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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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