Vulnerability-Lookup

VAR-202509-0139

Vulnerability from variot - Updated: 2025-09-14 23:37

A weakness has been identified in Tenda AC20 16.03.08.05. This vulnerability affects unknown code of the file /goform/fromAdvSetMacMtuWan. This manipulation of the argument wanMTU causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be exploited. Shenzhen Tenda Technology Co.,Ltd. of AC20 An out-of-bounds write vulnerability exists in firmware.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. This vulnerability stems from the failure of the wanMTU parameter in the file /goform/fromAdvSetMacMtuWan to properly validate the length of input data. An attacker could exploit this vulnerability to execute arbitrary code on the system or cause a denial of service

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CVE-2025-9791 (GCVE-0-2025-9791)

Vulnerability from cvelistv5 – Published: 2025-09-01 19:02 – Updated: 2025-09-02 15:09

Title

Tenda AC20 fromAdvSetMacMtuWan stack-based overflow

Summary

Severity ?

8.7 (High)


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

8.8 (High)


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

8.8 (High)


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

CWE

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

Assigner

VulDB

References

URL

Tags

	https://vuldb.com/?id.322106	vdb-entrytechnical-description
	https://vuldb.com/?ctiid.322106	signaturepermissions-required
	https://vuldb.com/?submit.641088	third-party-advisory
	https://github.com/Cpppq43/Tenda/blob/main/Tenda_…	related
	https://github.com/Cpppq43/Tenda/blob/main/Tenda_…	exploit
	https://www.tenda.com.cn/	product

Impacted products

	Vendor	Product	Version
	Tenda	AC20	Affected: 16.03.08.05

Credits

BediveRE (VulDB User)

Show details on NVD website

JSON

To clipboard

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        {
          "lang": "en",
          "type": "reporter",
          "value": "BediveRE (VulDB User)"
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "A weakness has been identified in Tenda AC20 16.03.08.05. This vulnerability affects unknown code of the file /goform/fromAdvSetMacMtuWan. This manipulation of the argument wanMTU causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been made available to the public and could be exploited."
        },
        {
          "lang": "de",
          "value": "In Tenda AC20 16.03.08.05 wurde eine Schwachstelle gefunden. Hierbei geht es um eine nicht exakt ausgemachte Funktion der Datei /goform/fromAdvSetMacMtuWan. Durch Manipulieren des Arguments wanMTU mit unbekannten Daten kann eine stack-based buffer overflow-Schwachstelle ausgenutzt werden. Die Umsetzung des Angriffs kann dabei \u00fcber das Netzwerk erfolgen. Der Exploit wurde der \u00d6ffentlichkeit bekannt gemacht und k\u00f6nnte verwendet werden."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "baseScore": 8.7,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P",
            "version": "4.0"
          }
        },
        {
          "cvssV3_1": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R",
            "version": "3.1"
          }
        },
        {
          "cvssV3_0": {
            "baseScore": 8.8,
            "baseSeverity": "HIGH",
            "vectorString": "CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R",
            "version": "3.0"
          }
        },
        {
          "cvssV2_0": {
            "baseScore": 9,
            "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR",
            "version": "2.0"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-121",
              "description": "Stack-based Buffer Overflow",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-119",
              "description": "Memory Corruption",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2025-09-01T19:02:07.802Z",
        "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "shortName": "VulDB"
      },
      "references": [
        {
          "name": "VDB-322106 | Tenda AC20 fromAdvSetMacMtuWan stack-based overflow",
          "tags": [
            "vdb-entry",
            "technical-description"
          ],
          "url": "https://vuldb.com/?id.322106"
        },
        {
          "name": "VDB-322106 | CTI Indicators (IOB, IOC, IOA)",
          "tags": [
            "signature",
            "permissions-required"
          ],
          "url": "https://vuldb.com/?ctiid.322106"
        },
        {
          "name": "Submit #641088 | Tenda Tenda AC20 AC20_V16.03.08.05 Stack-based Buffer Overflow",
          "tags": [
            "third-party-advisory"
          ],
          "url": "https://vuldb.com/?submit.641088"
        },
        {
          "tags": [
            "related"
          ],
          "url": "https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md"
        },
        {
          "tags": [
            "exploit"
          ],
          "url": "https://github.com/Cpppq43/Tenda/blob/main/Tenda_AC20_V16.03.08.05.md#poc"
        },
        {
          "tags": [
            "product"
          ],
          "url": "https://www.tenda.com.cn/"
        }
      ],
      "timeline": [
        {
          "lang": "en",
          "time": "2025-09-01T00:00:00.000Z",
          "value": "Advisory disclosed"
        },
        {
          "lang": "en",
          "time": "2025-09-01T02:00:00.000Z",
          "value": "VulDB entry created"
        },
        {
          "lang": "en",
          "time": "2025-09-01T12:15:44.000Z",
          "value": "VulDB entry last update"
        }
      ],
      "title": "Tenda AC20 fromAdvSetMacMtuWan stack-based overflow"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
    "assignerShortName": "VulDB",
    "cveId": "CVE-2025-9791",
    "datePublished": "2025-09-01T19:02:07.802Z",
    "dateReserved": "2025-09-01T10:10:40.574Z",
    "dateUpdated": "2025-09-02T15:09:01.786Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.1"
}

Sightings

Author	Source	Type	Date

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

VAR-202509-0139

CVE-2025-9791 (GCVE-0-2025-9791)

Tags

Sightings

Nomenclature