Vulnerability-Lookup

CVE-2026-75784 (GCVE-0-2026-75784)

Vulnerability from cvelistv5 – Published: 2026-08-18 14:00 – Updated: 2026-08-20 17:20

Title

TRENDnet TEW-WLC100 HTTP Header nginx FUN_0040da4c stack-based overflow

Summary

A vulnerability was detected in TRENDnet TEW-WLC100 1v2.07b01. Affected by this issue is the function FUN_0040da4c of the file /usr/nginx/sbin/nginx of the component HTTP Header Handler. The manipulation of the argument Server results in stack-based buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.

Severity

10 (Critical)


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

10 (Critical)


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

10 (Critical)


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

SSVC

Exploitation: poc Automatable: yes Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-08-20 15:52 UTC

CWE

CWE-121 - Stack-based Buffer Overflow
CWE-119 - Memory Corruption

Assigner

VulDB mitre root

References

6 references

URL	Tags
https://vuldb.com/vuln/391525	vdb-entrytechnical-description
https://vuldb.com/vuln/391525/cti	signaturepermissions-required
https://vuldb.com/cve/CVE-2026-75784	third-party-advisory
https://vuldb.com/submit/877773	third-party-advisory
https://github.com/meishigana/CVE/tree/main/team1…	related
https://github.com/meishigana/CVE/blob/main/team1…	exploit

Impacted products

1 product

Vendor	Product	Version	CPE status
TRENDnet	TEW-WLC100	Affected: 1v2.07b01 cpe:2.3:a:trendnet:tew-wlc100::::::::

Credits

fuhanhan2014 (VulDB User)

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-75784

Vulnerability from fkie_nvd - Published: 2026-08-18 15:17 - Updated: 2026-08-20 18:16

Severity

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

Summary

References

	URL	Tags
	cna@vuldb.com	https://github.com/meishigana/CVE/blob/main/team15_20260702/02_wlc100-nginx/poc/poc-nginx-overflow.py
	cna@vuldb.com	https://github.com/meishigana/CVE/tree/main/team15_20260702/02_wlc100-nginx
	cna@vuldb.com	https://vuldb.com/cve/CVE-2026-75784
	cna@vuldb.com	https://vuldb.com/submit/877773
	cna@vuldb.com	https://vuldb.com/vuln/391525
	cna@vuldb.com	https://vuldb.com/vuln/391525/cti

Impacted products

	Vendor	Product	Version

JSON

To clipboard

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          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "NONE",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "cna@vuldb.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-75784",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "total"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2026-08-20T15:52:19.079542Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2026-08-18T15:17:13.857",
  "references": [
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/meishigana/CVE/blob/main/team15_20260702/02_wlc100-nginx/poc/poc-nginx-overflow.py"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://github.com/meishigana/CVE/tree/main/team15_20260702/02_wlc100-nginx"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/cve/CVE-2026-75784"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/submit/877773"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/391525"
    },
    {
      "source": "cna@vuldb.com",
      "url": "https://vuldb.com/vuln/391525/cti"
    }
  ],
  "sourceIdentifier": "cna@vuldb.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-119"
        },
        {
          "lang": "en",
          "value": "CWE-121"
        }
      ],
      "source": "cna@vuldb.com",
      "type": "Secondary"
    }
  ]
}

GHSA-XVH6-W8Q3-Q5G8

Vulnerability from github – Published: 2026-08-18 15:31 – Updated: 2026-08-18 15:31

Details

Severity

10.0 (Critical)


                  
                    CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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:H/SI:H/SA:H/E:P

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-75784"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-119"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-08-18T15:17:13Z",
    "severity": "CRITICAL"
  },
  "details": "A vulnerability was detected in TRENDnet TEW-WLC100 1v2.07b01. Affected by this issue is the function FUN_0040da4c of the file /usr/nginx/sbin/nginx of the component HTTP Header Handler. The manipulation of the argument Server results in stack-based buffer overflow. The attack may be launched remotely. The exploit is now public and may be used.",
  "id": "GHSA-xvh6-w8q3-q5g8",
  "modified": "2026-08-18T15:31:49Z",
  "published": "2026-08-18T15:31:49Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-75784"
    },
    {
      "type": "WEB",
      "url": "https://github.com/meishigana/CVE/blob/main/team15_20260702/02_wlc100-nginx/poc/poc-nginx-overflow.py"
    },
    {
      "type": "WEB",
      "url": "https://github.com/meishigana/CVE/tree/main/team15_20260702/02_wlc100-nginx"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/cve/CVE-2026-75784"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/submit/877773"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/391525"
    },
    {
      "type": "WEB",
      "url": "https://vuldb.com/vuln/391525/cti"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/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: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.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-75784 (GCVE-0-2026-75784)

FKIE_CVE-2026-75784

GHSA-XVH6-W8Q3-Q5G8

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Nomenclature

Related by attack behaviour