{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-129258", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-11-13T19:57:13.854Z", "datePublished": "2026-11-14T14:30:22.937Z", "dateUpdated": "2026-11-14T14:30:22.937Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-11-14T14:30:22.937Z"}, "title": "Tenda AC18 Firmware Upgrade upgrade data authenticity", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-345", "lang": "en", "description": "Insufficient Verification of Data Authenticity"}]}], "affected": [{"vendor": "Tenda", "product": "AC18", "versions": [{"version": "15.03.05.05_multi", "status": "affected"}, {"version": "15.03.05.19 Build 6318", "status": "affected"}], "cpes": ["cpe:2.3:o:tenda:ac18_firmware:*:*:*:*:*:*:*:*"], "modules": ["Firmware Upgrade Handler"]}], "descriptions": [{"lang": "en", "value": "A vulnerability was identified in Tenda AC18 15.03.05.05_multi/15.03.05.19 Build 6318. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/upgrade of the component Firmware Upgrade Handler. Such manipulation of the argument upgradeFile leads to insufficient verification of data authenticity. The attack may be launched remotely. The exploit is publicly available and might be used."}], "metrics": [{"cvssV4_0": {"version": "4.0", "baseScore": 9.4, "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P", "baseSeverity": "CRITICAL"}}, {"cvssV3_1": {"version": "3.1", "baseScore": 9.1, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C", "baseSeverity": "CRITICAL"}}, {"cvssV3_0": {"version": "3.0", "baseScore": 9.1, "vectorString": "CVSS:3.0/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H/E:P/RL:X/RC:C", "baseSeverity": "CRITICAL"}}, {"cvssV2_0": {"version": "2.0", "baseScore": 8.3, "vectorString": "AV:N/AC:L/Au:M/C:C/I:C/A:C/E:POC/RL:ND/RC:C"}}], "timeline": [{"time": "2026-11-13T00:00:00.000Z", "lang": "en", "value": "Advisory disclosed"}, {"time": "2026-11-13T01:00:00.000Z", "lang": "en", "value": "VulDB entry created"}, {"time": "2026-11-13T21:02:27.000Z", "lang": "en", "value": "VulDB entry last update"}], "credits": [{"lang": "en", "value": "Longqxxixi (VulDB User)", "type": "reporter"}], "references": [{"url": "https://vuldb.com/vuln/437295", "name": "VDB-437295 | Tenda AC18 Firmware Upgrade upgrade data authenticity", "tags": ["vdb-entry", "technical-description"]}, {"url": "https://vuldb.com/vuln/437295/cti", "name": "VDB-437295 | CTI Indicators (IOB, IOC, IOA)", "tags": ["signature", "permissions-required"]}, {"url": "https://vuldb.com/cve/CVE-2026-129258", "name": "CVE-2026-129258 | CVE Analysis and Report", "tags": ["third-party-advisory"]}, {"url": "https://vuldb.com/submit/1043033", "name": "Submit #1043033 | Tenda AC18 (AC18V1.0BR) wireless router V15.03.05.05_multi ,V15.03.05.19 build 6318 Insufficient Verification of Data Authenticity", "tags": ["third-party-advisory"]}, {"url": "https://github.com/longqx223/Tenda-ac-18-V15.03.05.05-/blob/main/2026-10-19-Tenda-AC18-unsigned-firmware-update-advisory-EN.pdf", "tags": ["exploit", "patch"]}, {"url": "https://www.tenda.com.cn/", "tags": ["product"]}], "x_generator": ["VulDB PVTS v202611"]}}}

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{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:o:tenda:ac18_firmware:*:*:*:*:*:*:*:*"], "modules": ["Firmware Upgrade Handler"], "product": "AC18", "vendor": "Tenda", "versions": [{"status": "affected", "version": "15.03.05.05_multi"}, {"status": "affected", "version": "15.03.05.19 Build 6318"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A vulnerability was identified in Tenda AC18 15.03.05.05_multi/15.03.05.19 Build 6318. Affected by this vulnerability is an unknown functionality of the file /cgi-bin/upgrade of the component Firmware Upgrade Handler. Such manipulation of the argument upgradeFile leads to insufficient verification of data authenticity. The attack may be launched remotely. The exploit is publicly available and might be used."}], "id": "CVE-2026-129258", "lastModified": "2026-11-14T15:16:58.433", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "MULTIPLE", "availabilityImpact": "COMPLETE", "baseScore": 8.3, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:M/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 6.4, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.1, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "CHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.3, "impactScore": 6.0, "source": "cna@vuldb.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.5, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "HIGH", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "HIGH", "subConfidentialityImpact": "HIGH", "subIntegrityImpact": "HIGH", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:P/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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}]}, "published": "2026-11-14T15:16:58.257", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/longqx223/Tenda-ac-18-V15.03.05.05-/blob/main/2026-10-19-Tenda-AC18-unsigned-firmware-update-advisory-EN.pdf"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/cve/CVE-2026-129258"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/1043033"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/437295"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/437295/cti"}, {"source": "cna@vuldb.com", "url": "https://www.tenda.com.cn/"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-345"}], "source": "cna@vuldb.com", "type": "Primary"}]}

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