{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-71934", "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "state": "PUBLISHED", "assignerShortName": "VulnCheck", "dateReserved": "2026-08-08T16:37:44.519Z", "datePublished": "2026-08-24T17:07:59.785Z", "dateUpdated": "2026-08-24T19:56:23.451Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10", "shortName": "VulnCheck", "dateUpdated": "2026-08-24T17:07:59.785Z"}, "datePublic": "2026-08-24T00:00:00.000Z", "title": "DrayTek VigorSwitch Multiple Models Buffer Overflow via pingtrace", "descriptions": [{"lang": "en", "value": "Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the pingtrace function. The vulnerability is caused by missing length checks when the host, count, and interval fields are concatenated into a fixed-size buffer. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface."}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-120", "description": "Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')", "type": "CWE"}]}], "affected": [{"vendor": "DrayTek Corporation", "product": "VigorSwitch G2540xs", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "3.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P2540xs", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "3.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch FX2120", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "3.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch G2282x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.10.6", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P2282x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.10.6", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch Q2300x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.10.7", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch PQ2300xb", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.10.7", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch G2542x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "3.10.6", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P2542x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "3.10.6", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P2542xh", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "3.10.6", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch PX2060", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch G1280", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P1280", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P1281x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch G1282", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P1282", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch G2121", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P2121", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch PQ2121x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch Q2121x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch G2280x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P2280x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch Q2200x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch PQ2200xb", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch G2100", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P2100", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch G2540x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}, {"vendor": "DrayTek Corporation", "product": "VigorSwitch P2540x", "defaultStatus": "unaffected", "versions": [{"version": "0", "lessThan": "2.9.10", "status": "affected", "versionType": "custom"}]}], "cpeApplicability": [{"nodes": [{"operator": "OR", "negate": false, "cpeMatch": [{"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_g2540xs_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_p2540xs_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_fx2120_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "3.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_g1282_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_p1282_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_g2121_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_pq2121x_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_q2121x_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_g2280x_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_p2280x_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_q2200x_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_pq2200xb_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_g2100_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}, {"vulnerable": true, "criteria": "cpe:2.3:o:draytek:vigorswitch_p2100_firmware:*:*:*:*:*:*:*:*", "versionEndExcluding": "2.9.10"}]}]}], "metrics": [{"format": "CVSS", "cvssV4_0": {"version": "4.0", "vectorString": "CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N", "baseScore": 8.6, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "attackRequirements": "NONE", "privilegesRequired": "HIGH", "userInteraction": "NONE", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnAvailabilityImpact": "HIGH", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "subAvailabilityImpact": "NONE"}}, {"format": "CVSS", "cvssV3_1": {"version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.2, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "HIGH", "userInteraction": "NONE", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "availabilityImpact": "HIGH"}}], "references": [{"url": "https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/", "tags": ["vendor-advisory"]}, {"name": "VulnCheck Advisory: DrayTek VigorSwitch Multiple Models Buffer Overflow via pingtrace", "tags": ["third-party-advisory"], "url": "https://www.vulncheck.com/advisories/draytek-vigorswitch-multiple-models-buffer-overflow-via-pingtrace"}], "credits": [{"lang": "en", "value": "Jincheng Wang (@winmt)", "type": "finder"}, {"lang": "en", "value": "Le Yu (Nanjing University of Posts and Telecommunications)", "type": "finder"}, {"lang": "en", "value": "Xiapu Luo (The Hong Kong Polytechnic University)", "type": "finder"}], "x_generator": {"engine": "vulncheck-endgame"}}, "adp": [{"metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2026-08-24T19:56:12.590599Z", "id": "CVE-2026-71934", "options": [{"Exploitation": "none"}, {"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": "2026-08-24T19:56:23.451Z"}}]}}

{}

{"affected": [{"affectedData": [{"defaultStatus": "unaffected", "product": "VigorSwitch G2540xs", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "3.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P2540xs", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "3.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch FX2120", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "3.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch G2282x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.10.6", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P2282x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.10.6", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch Q2300x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.10.7", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch PQ2300xb", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.10.7", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch G2542x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "3.10.6", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P2542x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "3.10.6", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P2542xh", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "3.10.6", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch PX2060", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch G1280", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P1280", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P1281x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch G1282", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P1282", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch G2121", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P2121", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch PQ2121x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch Q2121x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch G2280x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P2280x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch Q2200x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch PQ2200xb", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch G2100", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P2100", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch G2540x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}, {"defaultStatus": "unaffected", "product": "VigorSwitch P2540x", "vendor": "DrayTek Corporation", "versions": [{"lessThan": "2.9.10", "status": "affected", "version": "0", "versionType": "custom"}]}], "source": "disclosure@vulncheck.com"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Multiple DrayTek VigorSwitch models contain a buffer overflow vulnerability in the pingtrace function. The vulnerability is caused by missing length checks when the host, count, and interval fields are concatenated into a fixed-size buffer. A remote attacker can trigger this vulnerability via crafted input, causing a denial of service or potentially executing arbitrary commands. Exploitation requires valid administrative credentials for the device's web management interface."}], "id": "CVE-2026-71934", "lastModified": "2026-08-24T18:17:18.290", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.2, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.2, "impactScore": 5.9, "source": "disclosure@vulncheck.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 8.6, "baseSeverity": "HIGH", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "NOT_DEFINED", "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": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "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: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", "version": "4.0", "vulnAvailabilityImpact": "HIGH", "vulnConfidentialityImpact": "HIGH", "vulnIntegrityImpact": "HIGH", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "disclosure@vulncheck.com", "type": "Secondary"}]}, "published": "2026-08-24T18:17:18.290", "references": [{"source": "disclosure@vulncheck.com", "url": "https://www.draytek.com/about/security-advisory/multiple-vulnerabilities-in-vigorswitch-series-august-2026/"}, {"source": "disclosure@vulncheck.com", "url": "https://www.vulncheck.com/advisories/draytek-vigorswitch-multiple-models-buffer-overflow-via-pingtrace"}], "sourceIdentifier": "disclosure@vulncheck.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-120"}], "source": "disclosure@vulncheck.com", "type": "Primary"}]}

{}

{"created": "2026-08-24T19:30:17.420819+00:00", "updated": "2026-08-24T19:30:17.420825+00:00", "vendors": []}