{
    "dataType": "CVE_RECORD",
    "dataVersion": "5.2",
    "cveMetadata": {
        "cveId": "CVE-2026-1637",
        "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
        "state": "PUBLISHED",
        "assignerShortName": "VulDB",
        "dateReserved": "2026-01-29T16:56:17.581Z",
        "datePublished": "2026-01-29T22:32:07.685Z",
        "dateUpdated": "2026-02-23T09:07:49.829Z"
    },
    "containers": {
        "cna": {
            "providerMetadata": {
                "orgId": "1af790b2-7ee1-4545-860a-a788eba489b5",
                "shortName": "VulDB",
                "dateUpdated": "2026-02-23T09:07:49.829Z"
            },
            "title": "Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow",
            "problemTypes": [
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-121",
                            "lang": "en",
                            "description": "Stack-based Buffer Overflow"
                        }
                    ]
                },
                {
                    "descriptions": [
                        {
                            "type": "CWE",
                            "cweId": "CWE-119",
                            "lang": "en",
                            "description": "Memory Corruption"
                        }
                    ]
                }
            ],
            "affected": [
                {
                    "vendor": "Tenda",
                    "product": "AC21",
                    "versions": [
                        {
                            "version": "16.03.08.16",
                            "status": "affected"
                        }
                    ],
                    "cpes": [
                        "cpe:2.3:o:tenda:ac21_firmware:*:*:*:*:*:*:*:*"
                    ]
                }
            ],
            "descriptions": [
                {
                    "lang": "en",
                    "value": "A vulnerability was identified in Tenda AC21 16.03.08.16. The affected element is the function fromAdvSetMacMtuWan of the file /goform/AdvSetMacMtuWan. The manipulation leads to stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit is publicly available and might be used."
                }
            ],
            "metrics": [
                {
                    "cvssV4_0": {
                        "version": "4.0",
                        "baseScore": 8.7,
                        "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",
                        "baseSeverity": "HIGH"
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                },
                {
                    "cvssV3_1": {
                        "version": "3.1",
                        "baseScore": 8.8,
                        "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",
                        "baseSeverity": "HIGH"
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                    "cvssV3_0": {
                        "version": "3.0",
                        "baseScore": 8.8,
                        "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",
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                    "cvssV2_0": {
                        "version": "2.0",
                        "baseScore": 9,
                        "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C/E:POC/RL:ND/RC:UR"
                    }
                }
            ],
            "timeline": [
                {
                    "time": "2026-01-29T00:00:00.000Z",
                    "lang": "en",
                    "value": "Advisory disclosed"
                },
                {
                    "time": "2026-01-29T01:00:00.000Z",
                    "lang": "en",
                    "value": "VulDB entry created"
                },
                {
                    "time": "2026-02-04T03:53:45.000Z",
                    "lang": "en",
                    "value": "VulDB entry last update"
                }
            ],
            "credits": [
                {
                    "lang": "en",
                    "value": "LX-LX (VulDB User)",
                    "type": "reporter"
                }
            ],
            "references": [
                {
                    "url": "https://vuldb.com/?id.343416",
                    "name": "VDB-343416 | Tenda AC21 AdvSetMacMtuWan fromAdvSetMacMtuWan stack-based overflow",
                    "tags": [
                        "vdb-entry",
                        "technical-description"
                    ]
                },
                {
                    "url": "https://vuldb.com/?ctiid.343416",
                    "name": "VDB-343416 | CTI Indicators (IOB, IOC, IOA)",
                    "tags": [
                        "signature",
                        "permissions-required"
                    ]
                },
                {
                    "url": "https://vuldb.com/?submit.740865",
                    "name": "Submit #740865 | Tenda AC21 V16.03.08.16 Buffer Overflow",
                    "tags": [
                        "third-party-advisory"
                    ]
                },
                {
                    "url": "https://github.com/LX-LX88/cve/issues/25",
                    "tags": [
                        "broken-link",
                        "exploit",
                        "issue-tracking"
                    ]
                },
                {
                    "url": "https://www.tenda.com.cn/",
                    "tags": [
                        "product"
                    ]
                }
            ]
        },
        "adp": [
            {
                "references": [
                    {
                        "url": "https://github.com/LX-LX88/cve/issues/25",
                        "tags": [
                            "exploit"
                        ]
                    }
                ],
                "metrics": [
                    {
                        "other": {
                            "type": "ssvc",
                            "content": {
                                "timestamp": "2026-01-30T14:36:34.085802Z",
                                "id": "CVE-2026-1637",
                                "options": [
                                    {
                                        "Exploitation": "poc"
                                    },
                                    {
                                        "Automatable": "no"
                                    },
                                    {
                                        "Technical Impact": "total"
                                    }
                                ],
                                "role": "CISA Coordinator",
                                "version": "2.0.3"
                            }
                        }
                    }
                ],
                "title": "CISA ADP Vulnrichment",
                "providerMetadata": {
                    "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
                    "shortName": "CISA-ADP",
                    "dateUpdated": "2026-02-02T16:33:53.523Z"
                }
            }
        ]
    }
}