Vulnerability-Lookup

GHSA-XVH6-W8Q3-Q5G8

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

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.

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

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{
  "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"
    }
  ]
}

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

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
TRENDnet	TEW-WLC100	Affected: 1v2.07b01 cpe:2.3:a:trendnet:tew-wlc100::::::::

Credits

fuhanhan2014 (VulDB User)

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-75784",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-08-20T15:52:19.079542Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-08-20T17:20:33.880Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      }
    ],
    "cna": {
      "affected": [
        {
          "cpes": [
            "cpe:2.3:a:trendnet:tew-wlc100:*:*:*:*:*:*:*:*"
          ],
          "modules": [
            "HTTP Header Handler"
          ],
          "product": "TEW-WLC100",
          "vendor": "TRENDnet",
          "versions": [
            {
              "status": "affected",
              "version": "1v2.07b01"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "reporter",
          "value": "fuhanhan2014 (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "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."
        }
      ],
      "metrics": [
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          "cvssV4_0": {
            "baseScore": 10,
            "baseSeverity": "CRITICAL",
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          }
        },
        {
          "cvssV3_1": {
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          }
        },
        {
          "cvssV2_0": {
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        },
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          "tags": [
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          "url": "https://vuldb.com/vuln/391525/cti"
        },
        {
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          "tags": [
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        },
        {
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          "tags": [
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        },
        {
          "tags": [
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          "url": "https://github.com/meishigana/CVE/tree/main/team15_20260702/02_wlc100-nginx"
        },
        {
          "tags": [
            "exploit"
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          "url": "https://github.com/meishigana/CVE/blob/main/team15_20260702/02_wlc100-nginx/poc/poc-nginx-overflow.py"
        }
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          "time": "2026-08-18T00:00:00.000Z",
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          "lang": "en",
          "time": "2026-08-18T02:00:00.000Z",
          "value": "VulDB entry created"
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          "lang": "en",
          "time": "2026-08-18T08:56:29.000Z",
          "value": "VulDB entry last update"
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      ],
      "title": "TRENDnet TEW-WLC100 HTTP Header nginx FUN_0040da4c stack-based overflow",
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        "VulDB PVTS v202608"
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  },
  "cveMetadata": {
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    "datePublished": "2026-08-18T14:00:09.095Z",
    "dateReserved": "2026-08-18T06:51:23.762Z",
    "dateUpdated": "2026-08-20T17:20:33.880Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

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-XVH6-W8Q3-Q5G8

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

Tags

Sightings

Nomenclature