Vulnerability-Lookup

CVE-2026-41927 (GCVE-0-2026-41927)

Vulnerability from cvelistv5 – Published: 2026-05-04 19:20 – Updated: 2026-05-11 23:11

Title

WDR201A WiFi Extender Stack-Based Buffer Overflow via firewall.cgi

Summary

WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains a stack-based buffer overflow vulnerability in the firewall.cgi and makeRequest.cgi binaries that allows unauthenticated attackers to overwrite the saved return address by sending a POST request with a Content-Length header exceeding 512 bytes. Attackers can exploit insufficient length validation in the fgets() call to achieve arbitrary code execution through return-oriented programming or return-to-libc techniques.

Severity

8.3 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-05 14:12 UTC

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulnCheck mitre root

References

3 references

URL	Tags
https://mstreet97.github.io/security-research/iot…	technical-descriptionexploit
https://www.made-in-china.com/showroom/yeapook/#:…	product
https://www.vulncheck.com/advisories/wdr201a-wifi…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version	CPE status
Shenzhen Yipu Commercial and Trading Co., Ltd	WDR201A WiFi Extender	Affected: 0 , ≤ 1.02.0 (custom)	guessed

Date Public

2026-05-04 00:00

Credits

Daniele Berardinelli Matteo Strada

Show details on NVD website

JSON

To clipboard

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FKIE_CVE-2026-41927

Vulnerability from fkie_nvd - Published: 2026-05-04 20:16 - Updated: 2026-06-17 10:47

Severity

8.3 (High) - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/VA:H/SC:N/SI:N/SA:N

Summary

References

	URL	Tags
	disclosure@vulncheck.com	https://mstreet97.github.io/security-research/iot/vulnerability-disclosure/ai-assisted-research/cybersecurity/cve/2026/05/04/Teaching_the_Machine_Where_to_Look.html
	disclosure@vulncheck.com	https://www.made-in-china.com/showroom/yeapook/#:~:text=Established%20in%202015.%2CDistrict%2C%20Shenzhen%2C%20Guangdong%2C%20China
	disclosure@vulncheck.com	https://www.vulncheck.com/advisories/wdr201a-wifi-extender-stack-based-buffer-overflow-via-firewall-cgi

Impacted products

	Vendor	Product	Version

JSON

To clipboard

{
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      "affectedData": [
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          "defaultStatus": "unaffected",
          "product": "WDR201A WiFi Extender",
          "vendor": "Shenzhen Yipu Commercial and Trading Co., Ltd",
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    }
  ],
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  "lastModified": "2026-06-17T10:47:12.620",
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          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
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}

GHSA-59Q4-38Q7-24RV

Vulnerability from github – Published: 2026-05-04 21:30 – Updated: 2026-05-04 21:30

Details

Severity

8.3 (High)


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

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-41927"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-121"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-04T20:16:19Z",
    "severity": "HIGH"
  },
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  "id": "GHSA-59q4-38q7-24rv",
  "modified": "2026-05-04T21:30:26Z",
  "published": "2026-05-04T21:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41927"
    },
    {
      "type": "WEB",
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    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/wdr201a-wifi-extender-stack-based-buffer-overflow-via-firewall-cgi"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:L/VI:L/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"
    }
  ]
}

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-2026-41927 (GCVE-0-2026-41927)

FKIE_CVE-2026-41927

GHSA-59Q4-38Q7-24RV

Tags

Sightings

Nomenclature

Related by attack behaviour