Vulnerability-Lookup

CVE-2026-77683 (GCVE-0-2026-77683)

Vulnerability from cvelistv5 – Published: 2026-08-21 10:15 – Updated: 2026-08-21 13:52

Title

Comfast CF-N1-S mbox-config system command injection

Summary

A security flaw has been discovered in Comfast CF-N1-S 2.6.0.1. Affected by this issue is the function system of the file /cgi-bin/mbox-config?method=SET&section=ntp_timezone. The manipulation of the argument timestr results in command injection. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.

Severity

9.4 (Critical)


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

9.9 (Critical)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

9.9 (Critical)


                        
                          CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:R

SSVC

Exploitation: poc Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-21 13:51 UTC

CWE

CWE-77 - Command Injection
CWE-74 - Injection

Assigner

VulDB mitre root

References

5 references

URL	Tags
https://vuldb.com/vuln/394033	vdb-entrytechnical-description
https://vuldb.com/vuln/394033/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-77683	third-party-advisory
https://vuldb.com/submit/881058	third-party-advisory
https://github.com/AdminSafe/CVE/issues/8	exploitissue-tracking

Impacted products

1 product

Vendor	Product	Version	CPE status
Comfast	CF-N1-S	Affected: 2.6.0.1 cpe:2.3:a:comfast:cf-n1-s::::::::

Credits

010hex (VulDB User)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-77683

Vulnerability from fkie_nvd - Published: 2026-08-21 11:17 - Updated: 2026-08-21 14:16

Severity

9.9 (Critical) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/AdminSafe/CVE/issues/8
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-77683
	cna@vuldb.com	https://vuldb.com/submit/881058
	cna@vuldb.com	https://vuldb.com/vuln/394033
	cna@vuldb.com	https://vuldb.com/vuln/394033/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "cpes": [
            "cpe:2.3:a:comfast:cf-n1-s:*:*:*:*:*:*:*:*"
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          "product": "CF-N1-S",
          "vendor": "Comfast",
          "versions": [
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    }
  ],
  "id": "CVE-2026-77683",
  "lastModified": "2026-08-21T14:16:53.637",
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          "confidentialityRequirement": "NOT_DEFINED",
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          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
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          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
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          "providerUrgency": "NOT_DEFINED",
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          "subConfidentialityImpact": "HIGH",
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          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
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    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-77683",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-21T13:51:46.509367Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-21T11:17:06.457",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/AdminSafe/CVE/issues/8"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-77683"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/881058"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/394033"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/394033/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Received",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-74"
        },
        {
          "lang": "en",
          "value": "CWE-77"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-HH37-XHG2-X62W

Vulnerability from github – Published: 2026-08-21 12:30 – Updated: 2026-08-21 12:30

Details

Severity

9.9 (Critical)


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

8.6 (High)


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

Show details on source website

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{
  "affected": [],
  "aliases": [
    "CVE-2026-77683"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-74"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-21T11:17:06Z",
    "severity": "HIGH"
  },
  "details": "A security flaw has been discovered in Comfast CF-N1-S 2.6.0.1. Affected by this issue is the function system of the file /cgi-bin/mbox-config?method=SET\u0026section=ntp_timezone. The manipulation of the argument timestr results in command injection. The attack can be launched remotely. The exploit has been released to the public and may be used for attacks.",
  "id": "GHSA-hh37-xhg2-x62w",
  "modified": "2026-08-21T12:30:32Z",
  "published": "2026-08-21T12:30:32Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-77683"
    },
    {
      "type": "WEB",
      "url": "https://github.com/AdminSafe/CVE/issues/8"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-77683"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/881058"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/394033"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/394033/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H",
      "type": "CVSS_V3"
    },
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/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"
    }
  ]
}

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

CVE-2026-77683 (GCVE-0-2026-77683)

FKIE_CVE-2026-77683

GHSA-HH37-XHG2-X62W

Tags

Sightings

Nomenclature