Vulnerability-Lookup

GHSA-2H7P-Q23R-5GCF

Vulnerability from github – Published: 2026-08-27 15:31 – Updated: 2026-08-27 15:31

Details

Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service's authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective.

Severity

9.8 (Critical)


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

9.3 (Critical)


                  
                    CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

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{
  "affected": [],
  "aliases": [
    "CVE-2026-74233"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-27T13:18:34Z",
    "severity": "CRITICAL"
  },
  "details": "Zbtlink WE1326, WE357, WE5926, WE5926-WD, WE826-Q, WE826-T2, WE826-WD, WG108, and WG3526 firmware 19.1101, Zbtlink WE2426-C firmware 19.1112, Zbtlink WE5926-EC_QP firmware 20.0516, Zbtlink WF3526-P firmware 19.051, CTN720-W1, LF-1541, and MT7620N firmware 19.1101, and WRC1 firmware 20.0622 contain an unauthenticated command injection in the infosrvd service (UDP/9992). A remote unauthenticated attacker can send a crafted UDP packet to execute arbitrary commands as root. The service\u0027s authentication uses a hardcoded salt and an all-zero wildcard MAC bypass, rendering it ineffective.",
  "id": "GHSA-2h7p-q23r-5gcf",
  "modified": "2026-08-27T15:31:34Z",
  "published": "2026-08-27T15:31:34Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-74233"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection"
    },
    {
      "type": "WEB",
      "url": "http://vulncheck.com/blog/zbt-darklantern-speakingstone"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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-2026-74233 (GCVE-0-2026-74233)

Vulnerability from cvelistv5 – Published: 2026-08-27 10:40 – Updated: 2026-08-27 13:41

Title

Zbtlink MQWrt infosrvd Command Injection

Summary

Severity

9.3 (Critical)


                        
                          CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

9.8 (Critical)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-27 13:41 UTC

CWE

CWE-321 - Use of Hard-coded Cryptographic Key
CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

VulnCheck mitre root

References

2 references

URL	Tags
http://vulncheck.com/blog/zbt-darklantern-speakingstone	technical-descriptionexploit
https://www.vulncheck.com/advisories/zbtlink-mqwr…	third-party-advisory

Impacted products

16 products

Vendor	Product	Version
Zbtlink	WE1326	Affected: 19.1101 (custom)
Zbtlink	WE2426-C	Affected: 19.1112 (custom)
Zbtlink	WE357	Affected: 19.1101 (custom)
Zbtlink	WE5926	Affected: 19.1101 (custom)
Zbtlink	WE5926-EC_QP	Affected: 20.0516 (custom)
Zbtlink	WE5926-WD	Affected: 19.1101 (custom)
Zbtlink	WE826-Q	Affected: 19.1101 (custom)
Zbtlink	WE826-T2	Affected: 19.1101 (custom)
Zbtlink	WE826-WD	Affected: 19.1101 (custom)
Zbtlink	WF3526-P	Affected: 19.051 (custom)
Zbtlink	WG108	Affected: 19.1101 (custom)
Zbtlink	WG3526	Affected: 19.1101 (custom)
Unknown	CTN720-W1	Affected: 19.1101 (custom)
Unknown	LF-1541	Affected: 19.1101 (custom)
Unknown	MT7620N	Affected: 19.1101 (custom)
Unknown	WRC1	Affected: 20.0622 (custom)

Date Public

2026-08-27 00:00

Credits

Jacob Baines of VulnCheck

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-74233",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-27T13:41:26.633961Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-27T13:41:32.924Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
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              "versionType": "custom"
            }
          ]
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            }
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        },
        {
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            {
              "status": "affected",
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            }
          ]
        },
        {
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          "product": "WE5926",
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          "versions": [
            {
              "status": "affected",
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              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
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              "status": "affected",
              "version": "20.0516",
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        {
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          "vendor": "Zbtlink",
          "versions": [
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              "versionType": "custom"
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        },
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          "product": "WG108",
          "vendor": "Zbtlink",
          "versions": [
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              "status": "affected",
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        },
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          "product": "CTN720-W1",
          "vendor": "Unknown",
          "versions": [
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              "status": "affected",
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              "versionType": "custom"
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          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "LF-1541",
          "vendor": "Unknown",
          "versions": [
            {
              "status": "affected",
              "version": "19.1101",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "MT7620N",
          "vendor": "Unknown",
          "versions": [
            {
              "status": "affected",
              "version": "19.1101",
              "versionType": "custom"
            }
          ]
        },
        {
          "defaultStatus": "unknown",
          "product": "WRC1",
          "vendor": "Unknown",
          "versions": [
            {
              "status": "affected",
              "version": "20.0622",
              "versionType": "custom"
            }
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        }
      ],
      "impacts": [
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          "capecId": "CAPEC-88",
          "descriptions": [
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              "lang": "en",
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      "metrics": [
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            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "valueDensity": "NOT_DEFINED",
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            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
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            "scope": "UNCHANGED",
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            "version": "3.1"
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              "description": "Use of Hard-coded Cryptographic Key",
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      ],
      "providerMetadata": {
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        },
        {
          "tags": [
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          "url": "https://www.vulncheck.com/advisories/zbtlink-mqwrt-infosrvd-command-injection"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Zbtlink MQWrt infosrvd Command Injection",
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  "cveMetadata": {
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    "cveId": "CVE-2026-74233",
    "datePublished": "2026-08-27T10:40:11.313Z",
    "dateReserved": "2026-08-14T18:01:19.917Z",
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  },
  "dataType": "CVE_RECORD",
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}

Sightings

Author	Source	Type	Date	Other

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.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.

Action not permitted

GHSA-2H7P-Q23R-5GCF

CVE-2026-74233 (GCVE-0-2026-74233)

Tags

Sightings

Nomenclature