{"api_version":"1","generated_at":"2026-07-23T14:42:09+00:00","cve":"CVE-2023-35838","urls":{"html":"https://cve.report/CVE-2023-35838","api":"https://cve.report/api/cve/CVE-2023-35838.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2023-35838","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-35838"},"summary":{"title":"CVE-2023-35838","description":"The WireGuard client 0.5.3 on Windows insecurely configures the operating system and firewall such that traffic to a local network that uses non-RFC1918 IP addresses is blocked. This allows an adversary to trick the victim into blocking IP traffic to selected IP addresses and services even while the VPN is enabled. 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NOTE: the tunnelcrack.mathyvanhoef.com website uses this CVE ID to refer more generally to \"LocalNet attack resulting in the blocking of traffic\" rather than to only WireGuard."}]},"problemtype":{"problemtype_data":[{"description":[{"lang":"eng","value":"n/a"}]}]},"references":{"reference_data":[{"url":"https://wireguard.com","refsource":"MISC","name":"https://wireguard.com"},{"refsource":"MISC","name":"https://tunnelcrack.mathyvanhoef.com/details.html","url":"https://tunnelcrack.mathyvanhoef.com/details.html"},{"refsource":"CONFIRM","name":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0015","url":"https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2023-0015"}]}},"nvd":{"publishedDate":"2023-08-09 23:15:00","lastModifiedDate":"2023-10-31 09:15:00","problem_types":["CWE-610"],"metrics":{"baseMetricV3":{"cvssV3":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H","attackVector":"ADJACENT_NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"NONE","availabilityImpact":"HIGH","baseScore":5.7,"baseSeverity":"MEDIUM"},"exploitabilityScore":2.1,"impactScore":3.6}},"configurations":{"CVE_data_version":"4.0","nodes":[{"operator":"AND","children":[{"operator":"OR","children":[],"cpe_match":[{"vulnerable":true,"cpe23Uri":"cpe:2.3:a:wireguard:wireguard:0.5.3:*:*:*:*:*:*:*","cpe_name":[]}]},{"operator":"OR","children":[],"cpe_match":[{"vulnerable":false,"cpe23Uri":"cpe:2.3:o:microsoft:windows:-:*:*:*:*:*:*:*","cpe_name":[]}]}],"cpe_match":[]}]}},"legacy_mitre":{"record":null,"notes":[]}}}