Vulnerability-Lookup

GHSA-6XFM-HCMF-CH35

Vulnerability from github – Published: 2026-01-23 18:31 – Updated: 2026-01-23 18:31

Details

LogonExpert 8.1 contains an unquoted service path vulnerability in the LogonExpertSvc service running with LocalSystem privileges. Attackers can exploit the unquoted path to place malicious executables in intermediate directories, potentially gaining elevated system access during service startup.

Severity ?

7.8 (High)


                  
                    CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

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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JSON

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{
  "affected": [],
  "aliases": [
    "CVE-2021-47890"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-428"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-01-23T17:15:52Z",
    "severity": "HIGH"
  },
  "details": "LogonExpert 8.1 contains an unquoted service path vulnerability in the LogonExpertSvc service running with LocalSystem privileges. Attackers can exploit the unquoted path to place malicious executables in intermediate directories, potentially gaining elevated system access during service startup.",
  "id": "GHSA-6xfm-hcmf-ch35",
  "modified": "2026-01-23T18:31:29Z",
  "published": "2026-01-23T18:31:29Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2021-47890"
    },
    {
      "type": "WEB",
      "url": "https://download.logonexpert.com/LogonExpertSetup64.msi"
    },
    {
      "type": "WEB",
      "url": "https://www.exploit-db.com/exploits/49586"
    },
    {
      "type": "WEB",
      "url": "https://www.softros.com"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/logonexpert-logonexpertsvc-unquoted-service-path"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "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-2021-47890 (GCVE-0-2021-47890)

Vulnerability from cvelistv5 – Published: 2026-01-23 16:47 – Updated: 2026-01-23 19:17

Title

LogonExpert 8.1 - 'LogonExpertSvc' Unquoted Service Path

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

7.8 (High)


                        
                          CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE

CWE-428 - Unquoted Search Path or Element

Assigner

VulnCheck

References

URL

Tags

	https://www.exploit-db.com/exploits/49586	exploit
	https://www.softros.com/	product
	https://download.logonexpert.com/LogonExpertSetup64.msi	product
	https://www.vulncheck.com/advisories/logonexpert-…	third-party-advisory

Impacted products

	Vendor	Product	Version
	Softros Systems	LogonExpert	Affected: 8.1

Credits

Victor Mondragón

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2021-47890",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-01-23T19:17:46.289597Z",
                "version": "2.0.3"
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        "providerMetadata": {
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          "value": "Victor Mondrag\u00f3n"
        }
      ],
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      "descriptions": [
        {
          "lang": "en",
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        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "LOCAL",
            "baseScore": 8.5,
            "baseSeverity": "HIGH",
            "exploitMaturity": "NOT_DEFINED",
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            "subConfidentialityImpact": "NONE",
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            "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
            "version": "3.1"
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          "tags": [
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          "url": "https://www.exploit-db.com/exploits/49586"
        },
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          "tags": [
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          "url": "https://www.softros.com/"
        },
        {
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          "tags": [
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          "url": "https://download.logonexpert.com/LogonExpertSetup64.msi"
        },
        {
          "name": "VulnCheck Advisory: LogonExpert 8.1 - \u0027LogonExpertSvc\u0027 Unquoted Service Path",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/logonexpert-logonexpertsvc-unquoted-service-path"
        }
      ],
      "title": "LogonExpert 8.1 - \u0027LogonExpertSvc\u0027 Unquoted Service Path",
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  "cveMetadata": {
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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-6XFM-HCMF-CH35

CVE-2021-47890 (GCVE-0-2021-47890)

Tags

Sightings

Nomenclature