Vulnerability-Lookup

GHSA-327C-MQ4Q-4H9H

Vulnerability from github – Published: 2026-04-22 15:31 – Updated: 2026-04-22 15:31

Details

Incorrect Default Permissions in pcvisit service binary on Windows allows a low-privileged local attacker to escalate their privileges by overwriting the service binary with arbitrary contents. This service binary is automatically launched with NT\SYSTEM privileges on boot. This issue affects all versions after 22.6.22.1329 and was fixed in 25.12.3.1745.

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-0539"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-276"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-04-22T14:16:30Z",
    "severity": "HIGH"
  },
  "details": "Incorrect Default Permissions in pcvisit service binary on Windows allows a low-privileged local attacker to escalate their privileges by overwriting the service binary with arbitrary contents. This service binary is automatically launched with NT\\SYSTEM privileges on boot. This issue affects all versions after\u00a022.6.22.1329 and was fixed in 25.12.3.1745.",
  "id": "GHSA-327c-mq4q-4h9h",
  "modified": "2026-04-22T15:31:40Z",
  "published": "2026-04-22T15:31:40Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-0539"
    },
    {
      "type": "WEB",
      "url": "https://labs.infoguard.ch/advisories/cve-2026-0539_pcvisit_local-privilege-escalation"
    },
    {
      "type": "WEB",
      "url": "https://www.pcvisit.de/kundenbereich/release-notes"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ]
}

CVE-2026-0539 (GCVE-0-2026-0539)

Vulnerability from cvelistv5 – Published: 2026-04-22 13:02 – Updated: 2026-04-22 14:09

Title

Local Privilege Escalation in pcvisit service client

Summary

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

CWE

CWE-276 - Incorrect Default Permissions

Assigner

NCSC.ch

References

URL

Tags

	https://www.pcvisit.de/kundenbereich/release-notes	release-notes
	https://labs.infoguard.ch/advisories/cve-2026-053…	third-party-advisorytechnical-description

Impacted products

	Vendor	Product	Version
	pcvisit	pcvisit Remote Host Modul	Affected: 22.6.22.1329 , < 25.12.3.1745 (custom) Unaffected: 0 , < 22.6.22.1329 (custom) Unaffected: 25.12.3.1745

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JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-0539",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-04-22T14:06:45.464940Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-04-22T14:09:01.708Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
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        {
          "defaultStatus": "unknown",
          "platforms": [
            "Windows"
          ],
          "product": "pcvisit Remote Host Modul",
          "vendor": "pcvisit",
          "versions": [
            {
              "lessThan": "25.12.3.1745",
              "status": "affected",
              "version": "22.6.22.1329",
              "versionType": "custom"
            },
            {
              "lessThan": "22.6.22.1329",
              "status": "unaffected",
              "version": "0",
              "versionType": "custom"
            },
            {
              "status": "unaffected",
              "version": "25.12.3.1745"
            }
          ]
        }
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              "type": "text/html",
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            }
          ],
          "value": "Incorrect Default Permissions in pcvisit service binary on Windows allows a low-privileged local attacker to escalate their privileges by overwriting the service binary with arbitrary contents. This service binary is automatically launched with NT\\SYSTEM privileges on boot. This issue affects all versions after\u00a022.6.22.1329 and was fixed in 25.12.3.1745."
        }
      ],
      "impacts": [
        {
          "capecId": "CAPEC-233",
          "descriptions": [
            {
              "lang": "en",
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          ]
        }
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      "metrics": [
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          "cvssV4_0": {
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
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            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "LOW",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
            "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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            "vulnAvailabilityImpact": "HIGH",
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            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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          "scenarios": [
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      "providerMetadata": {
        "dateUpdated": "2026-04-22T13:02:01.750Z",
        "orgId": "455daabc-a392-441d-aa46-37d35189897c",
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      },
      "references": [
        {
          "tags": [
            "release-notes"
          ],
          "url": "https://www.pcvisit.de/kundenbereich/release-notes"
        },
        {
          "tags": [
            "third-party-advisory",
            "technical-description"
          ],
          "url": "https://labs.infoguard.ch/advisories/cve-2026-0539_pcvisit_local-privilege-escalation/"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Local Privilege Escalation in pcvisit service client",
      "x_generator": {
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  },
  "cveMetadata": {
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    "assignerShortName": "NCSC.ch",
    "cveId": "CVE-2026-0539",
    "datePublished": "2026-04-22T13:02:01.750Z",
    "dateReserved": "2025-12-23T13:06:22.032Z",
    "dateUpdated": "2026-04-22T14:09:01.708Z",
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  },
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}

Sightings

Author	Source	Type	Date

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.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
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.

Detection rules are retrieved from Rulezet.

Action not permitted

GHSA-327C-MQ4Q-4H9H

CVE-2026-0539 (GCVE-0-2026-0539)

Tags

Sightings

Nomenclature