{"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": "2026-08-24T17:07:59.785Z"}, "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. 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{"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"}}}}

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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. 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