Vulnerability-Lookup

GHSA-2FRF-W2P8-6VQ5

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

Details

WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the internet.cgi binary that allows unauthenticated remote attackers to execute arbitrary shell commands by injecting malicious input into the gateway POST parameter. Attackers can exploit unsanitized parameter concatenation in the set_add_routing function to inject shell commands that are executed via popen() with partial output reflected in the HTTP response.

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

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{
  "affected": [],
  "aliases": [
    "CVE-2026-41923"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-78"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-04T20:16:19Z",
    "severity": "CRITICAL"
  },
  "details": "WDR201A WiFi Extender (HW V2.1, FW LFMZX28040922V1.02) contains an OS command injection vulnerability in the internet.cgi binary that allows unauthenticated remote attackers to execute arbitrary shell commands by injecting malicious input into the gateway POST parameter. Attackers can exploit unsanitized parameter concatenation in the set_add_routing function to inject shell commands that are executed via popen() with partial output reflected in the HTTP response.",
  "id": "GHSA-2frf-w2p8-6vq5",
  "modified": "2026-05-04T21:30:26Z",
  "published": "2026-05-04T21:30:26Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-41923"
    },
    {
      "type": "WEB",
      "url": "https://mstreet97.github.io/security-research/iot/vulnerability-disclosure/ai-assisted-research/cybersecurity/cve/2026/05/04/Teaching_the_Machine_Where_to_Look.html"
    },
    {
      "type": "WEB",
      "url": "https://www.made-in-china.com/showroom/yeapook/#:~:text=Established%20in%202015.%2CDistrict%2C%20Shenzhen%2C%20Guangdong%2C%20China"
    },
    {
      "type": "WEB",
      "url": "https://www.vulncheck.com/advisories/wdr201a-wifi-extender-os-command-injection-via-internet-cgi"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "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-2026-41923 (GCVE-0-2026-41923)

Vulnerability from cvelistv5 – Published: 2026-05-04 19:10 – Updated: 2026-05-11 23:11

Title

WDR201A WiFi Extender OS Command Injection via internet.cgi

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

CWE

CWE-78 - Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')

Assigner

VulnCheck

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
Shenzhen Yipu Commercial and Trading Co., Ltd	WDR201A WiFi Extender	Affected: 0 , ≤ 1.02.0 (custom)

Date Public ?

2026-05-04 00:00

Credits

Matteo Strada Daniele Berardinelli

Show details on NVD website

JSON

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{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-41923",
                "options": [
                  {
                    "Exploitation": "poc"
                  },
                  {
                    "Automatable": "yes"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-05T13:09:28.051896Z",
                "version": "2.0.3"
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        },
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          ],
          "url": "https://www.vulncheck.com/advisories/wdr201a-wifi-extender-os-command-injection-via-internet-cgi"
        }
      ],
      "source": {
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      "title": "WDR201A WiFi Extender OS Command Injection via internet.cgi",
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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.

Action not permitted

GHSA-2FRF-W2P8-6VQ5

CVE-2026-41923 (GCVE-0-2026-41923)

Tags

Sightings

Nomenclature