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CVE-2026-76071 (GCVE-0-2026-76071)

Vulnerability from nvd – Published: 2026-08-24 15:42 – Updated: 2026-08-24 15:42

Title

Netis NC63 V3.0.0.3327 Stack Buffer Overflow via destHost Parameter

Summary

Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by supplying an oversized destHost parameter to the ipFilterList=mod action in netis.cgi. Attackers can exploit widthless sscanf conversions that copy user-supplied input into fixed-size stack buffers before authentication is verified, achieving remote code execution as root due to the Boa web server executing the CGI environment with root privileges.

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

9.8 (Critical)


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

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://ozcanpng.dev/blog/cve-2026-76071-netis-nc…	technical-descriptionexploit
https://github.com/ozcanpng/CVE-2026-76071	technical-descriptionexploit
https://www.netis-systems.com/products/NC63.html	product
https://www.vulncheck.com/advisories/netis-nc63-s…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netis Systems	NC63	Affected: 0 , ≤ 3.0.0.3327 (custom)

Date Public

2026-08-20 00:00

Credits

Özcan Ersan (@ozcanpng)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "NC63",
          "vendor": "Netis Systems",
          "versions": [
            {
              "lessThanOrEqual": "3.0.0.3327",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "\u00d6zcan Ersan (@ozcanpng)"
        }
      ],
      "datePublic": "2026-08-20T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by supplying an oversized destHost parameter to the ipFilterList=mod action in netis.cgi. Attackers can exploit widthless sscanf conversions that copy user-supplied input into fixed-size stack buffers before authentication is verified, achieving remote code execution as root due to the Boa web server executing the CGI environment with root privileges."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "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:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
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            "attackVector": "NETWORK",
            "availabilityImpact": "HIGH",
            "baseScore": 9.8,
            "baseSeverity": "CRITICAL",
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            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
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            "version": "3.1"
          },
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          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
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        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "Stack-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-24T15:42:33.056Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
      },
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          "name": "Researcher Blog",
          "tags": [
            "technical-description",
            "exploit"
          ],
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        },
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          "tags": [
            "technical-description",
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          ],
          "url": "https://github.com/ozcanpng/CVE-2026-76071"
        },
        {
          "name": "Product Page",
          "tags": [
            "product"
          ],
          "url": "https://www.netis-systems.com/products/NC63.html"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/netis-nc63-stack-buffer-overflow-via-desthost-parameter"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Netis NC63 V3.0.0.3327 Stack Buffer Overflow via destHost Parameter",
      "x_generator": {
        "engine": "vulncheck"
      }
    }
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  "cveMetadata": {
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    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-76071",
    "datePublished": "2026-08-24T15:42:33.056Z",
    "dateReserved": "2026-08-18T21:04:48.503Z",
    "dateUpdated": "2026-08-24T15:42:33.056Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
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}

CVE-2026-76070 (GCVE-0-2026-76070)

Vulnerability from nvd – Published: 2026-08-24 15:41 – Updated: 2026-08-24 15:43

Title

Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter

Summary

Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by submitting an oversized Base64-encoded password to the login handler in /bin/netis.cgi. Attackers can exploit the custom Base64 decoder's lack of output length validation against the fixed-size stack buffer to achieve remote code execution with root privileges, as the Boa web server executes the CGI environment as root.

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

9.8 (Critical)


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

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://ozcanpng.dev/blog/cve-2026-76070-netis-nc…	technical-descriptionexploit
https://github.com/ozcanpng/CVE-2026-76070	technical-descriptionexploit
https://www.netis-systems.com/products/NC63.html	product
https://www.vulncheck.com/advisories/netis-nc63-s…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netis Systems	NC63	Affected: 0 , ≤ 3.0.0.3327 (custom)

Date Public

2026-08-20 00:00

Credits

Özcan Ersan (@ozcanpng)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "NC63",
          "vendor": "Netis Systems",
          "versions": [
            {
              "lessThanOrEqual": "3.0.0.3327",
              "status": "affected",
              "version": "0",
              "versionType": "custom"
            }
          ]
        }
      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
          "value": "\u00d6zcan Ersan (@ozcanpng)"
        }
      ],
      "datePublic": "2026-08-20T00:00:00.000Z",
      "descriptions": [
        {
          "lang": "en",
          "value": "Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by submitting an oversized Base64-encoded password to the login handler in /bin/netis.cgi. Attackers can exploit the custom Base64 decoder\u0027s lack of output length validation against the fixed-size stack buffer to achieve remote code execution with root privileges, as the Boa web server executes the CGI environment as root."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "Automatable": "NOT_DEFINED",
            "Recovery": "NOT_DEFINED",
            "Safety": "NOT_DEFINED",
            "attackComplexity": "LOW",
            "attackRequirements": "NONE",
            "attackVector": "NETWORK",
            "baseScore": 9.3,
            "baseSeverity": "CRITICAL",
            "exploitMaturity": "NOT_DEFINED",
            "privilegesRequired": "NONE",
            "providerUrgency": "NOT_DEFINED",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "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:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH",
            "vulnerabilityResponseEffort": "NOT_DEFINED"
          },
          "format": "CVSS",
          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
          ]
        },
        {
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            "attackComplexity": "LOW",
            "attackVector": "NETWORK",
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            "integrityImpact": "HIGH",
            "privilegesRequired": "NONE",
            "scope": "UNCHANGED",
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            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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          },
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          "scenarios": [
            {
              "lang": "en",
              "value": "GENERAL"
            }
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      ],
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        {
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            {
              "cweId": "CWE-121",
              "description": "Stack-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-08-24T15:43:11.742Z",
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        },
        {
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            "exploit"
          ],
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        },
        {
          "name": "Product Page",
          "tags": [
            "product"
          ],
          "url": "https://www.netis-systems.com/products/NC63.html"
        },
        {
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://www.vulncheck.com/advisories/netis-nc63-stack-buffer-overflow-via-login-password-parameter"
        }
      ],
      "source": {
        "discovery": "UNKNOWN"
      },
      "title": "Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter",
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        "engine": "vulncheck"
      }
    }
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  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2026-76070",
    "datePublished": "2026-08-24T15:41:16.908Z",
    "dateReserved": "2026-08-18T21:04:48.503Z",
    "dateUpdated": "2026-08-24T15:43:11.742Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}

CVE-2025-3759 (GCVE-0-2025-3759)

Vulnerability from nvd – Published: 2025-05-08 10:05 – Updated: 2025-05-08 13:40

Title

Missing Authentication for Changing Device Configuration in WF2220

Summary

Endpoint /cgi-bin-igd/netcore_set.cgi which is used for changing device configuration is accessible without authentication. This poses a significant security threat allowing for e.g: administrator account hijacking or AP password changing. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-08 13:39 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

CERT-PL ENISA root

References

2 references

URL	Tags
https://cert.pl/posts/2025/05/CVE-2025-3758	third-party-advisory
https://cert.pl/en/posts/2025/05/CVE-2025-3758	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netis Systems	WF2220	Affected: 1.2.31706 (semver)

Credits

Kamil Szczurowski

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-3759",
                "options": [
                  {
                    "Exploitation": "none"
                  },
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                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-08T13:39:38.861197Z",
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        "providerMetadata": {
          "dateUpdated": "2025-05-08T13:40:38.421Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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        "title": "CISA ADP Vulnrichment"
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    "cna": {
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            }
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      ],
      "credits": [
        {
          "lang": "en",
          "type": "finder",
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      "impacts": [
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          "capecId": "CAPEC-50",
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              "value": "CAPEC-50 Password Recovery Exploitation"
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          "url": "https://cert.pl/en/posts/2025/05/CVE-2025-3758"
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      }
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CVE-2025-3758 (GCVE-0-2025-3758)

Vulnerability from nvd – Published: 2025-05-08 10:05 – Updated: 2025-10-03 08:57

Title

Exposure of Device Configuration without Authentication in WF2220

Summary

WF2220 exposes endpoint /cgi-bin-igd/netcore_get.cgi that returns configuration of the device to unauthorized users. Returned configuration includes cleartext password. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-08 13:46 UTC

CWE

CWE-306 - Missing Authentication for Critical Function
CWE-256 - Plaintext Storage of a Password

Assigner

CERT-PL ENISA root

References

2 references

URL	Tags
https://cert.pl/posts/2025/05/CVE-2025-3758	third-party-advisory
https://cert.pl/en/posts/2025/05/CVE-2025-3758	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netis Systems	WF2220	Affected: 1.2.31706 (semver)

Date Public

2025-05-08 00:00

Credits

Kamil Szczurowski

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-3758",
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                  },
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                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2025-05-08T13:46:28.583690Z",
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              },
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        "title": "CISA ADP Vulnrichment"
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          "type": "finder",
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        }
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      "impacts": [
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          "capecId": "CAPEC-383",
          "descriptions": [
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              "lang": "en",
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            }
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          "descriptions": [
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      "providerMetadata": {
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          "url": "https://cert.pl/en/posts/2025/05/CVE-2025-3758"
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CVE-2026-76071 (GCVE-0-2026-76071)

Vulnerability from cvelistv5 – Published: 2026-08-24 15:42 – Updated: 2026-08-24 15:42

Title

Netis NC63 V3.0.0.3327 Stack Buffer Overflow via destHost Parameter

Summary

Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by supplying an oversized destHost parameter to the ipFilterList=mod action in netis.cgi. Attackers can exploit widthless sscanf conversions that copy user-supplied input into fixed-size stack buffers before authentication is verified, achieving remote code execution as root due to the Boa web server executing the CGI environment with root privileges.

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

9.8 (Critical)


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

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://ozcanpng.dev/blog/cve-2026-76071-netis-nc…	technical-descriptionexploit
https://github.com/ozcanpng/CVE-2026-76071	technical-descriptionexploit
https://www.netis-systems.com/products/NC63.html	product
https://www.vulncheck.com/advisories/netis-nc63-s…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netis Systems	NC63	Affected: 0 , ≤ 3.0.0.3327 (custom)

Date Public

2026-08-20 00:00

Credits

Özcan Ersan (@ozcanpng)

Show details on NVD website

JSON

To clipboard

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  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
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          "vendor": "Netis Systems",
          "versions": [
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CVE-2026-76070 (GCVE-0-2026-76070)

Vulnerability from cvelistv5 – Published: 2026-08-24 15:41 – Updated: 2026-08-24 15:43

Title

Netis NC63 V3.0.0.3327 Stack Buffer Overflow via Login Password Parameter

Summary

Netis NC63 firmware through V3.0.0.3327 contains a stack-based buffer overflow vulnerability that allows unauthenticated remote attackers to overwrite saved stack state by submitting an oversized Base64-encoded password to the login handler in /bin/netis.cgi. Attackers can exploit the custom Base64 decoder's lack of output length validation against the fixed-size stack buffer to achieve remote code execution with root privileges, as the Boa web server executes the CGI environment as root.

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

9.8 (Critical)


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

CWE

CWE-121 - Stack-based Buffer Overflow

Assigner

VulnCheck mitre root

References

4 references

URL	Tags
https://ozcanpng.dev/blog/cve-2026-76070-netis-nc…	technical-descriptionexploit
https://github.com/ozcanpng/CVE-2026-76070	technical-descriptionexploit
https://www.netis-systems.com/products/NC63.html	product
https://www.vulncheck.com/advisories/netis-nc63-s…	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netis Systems	NC63	Affected: 0 , ≤ 3.0.0.3327 (custom)

Date Public

2026-08-20 00:00

Credits

Özcan Ersan (@ozcanpng)

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "cna": {
      "affected": [
        {
          "defaultStatus": "affected",
          "product": "NC63",
          "vendor": "Netis Systems",
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CVE-2025-3759 (GCVE-0-2025-3759)

Vulnerability from cvelistv5 – Published: 2025-05-08 10:05 – Updated: 2025-05-08 13:40

Title

Missing Authentication for Changing Device Configuration in WF2220

Summary

Endpoint /cgi-bin-igd/netcore_set.cgi which is used for changing device configuration is accessible without authentication. This poses a significant security threat allowing for e.g: administrator account hijacking or AP password changing. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-08 13:39 UTC

CWE

CWE-306 - Missing Authentication for Critical Function

Assigner

CERT-PL ENISA root

References

2 references

URL	Tags
https://cert.pl/posts/2025/05/CVE-2025-3758	third-party-advisory
https://cert.pl/en/posts/2025/05/CVE-2025-3758	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netis Systems	WF2220	Affected: 1.2.31706 (semver)

Credits

Kamil Szczurowski

Show details on NVD website

JSON

To clipboard

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2025-3759",
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CVE-2025-3758 (GCVE-0-2025-3758)

Vulnerability from cvelistv5 – Published: 2025-05-08 10:05 – Updated: 2025-10-03 08:57

Title

Exposure of Device Configuration without Authentication in WF2220

Summary

WF2220 exposes endpoint /cgi-bin-igd/netcore_get.cgi that returns configuration of the device to unauthorized users. Returned configuration includes cleartext password. The vendor was contacted early about this disclosure but did not respond in any way.

Severity

8.7 (High)


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

SSVC

Exploitation: none Automatable: no Technical Impact: total

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2025-05-08 13:46 UTC

CWE

CWE-306 - Missing Authentication for Critical Function
CWE-256 - Plaintext Storage of a Password

Assigner

CERT-PL ENISA root

References

2 references

URL	Tags
https://cert.pl/posts/2025/05/CVE-2025-3758	third-party-advisory
https://cert.pl/en/posts/2025/05/CVE-2025-3758	third-party-advisory

Impacted products

1 product

Vendor	Product	Version
Netis Systems	WF2220	Affected: 1.2.31706 (semver)

Date Public

2025-05-08 00:00

Credits

Kamil Szczurowski

Show details on NVD website

JSON

To clipboard

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8 vulnerabilities by Netis Systems

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CVE-2025-3758 (GCVE-0-2025-3758)