{"id":"CVE-2026-129104","state":"PUBLISHED","title":"Cudy TR3000 before 2.5.42 dnsmasq Configuration Injection via net.set_dhcp","description":"Cudy TR3000 before 2.5.42 contains a dnsmasq configuration injection vulnerability that allows authenticated administrators to inject directives by embedding a newline in the net.set_dhcp leasetime field. Attackers can append address= entries via /etc/init.d/dnsmasq to alter DNS answers for LAN clients, or insert invalid lines that stop dnsmasq.","publishedAt":"2026-11-13T15:38:28.886Z","updatedAt":"2026-11-13T15:38:28.886Z","severity":{"score":7,"label":"High","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","source":"VulnCheck"},"assigner":"VulnCheck","products":["Shenzhen Cudy Technology Co., Ltd. TR3000 1.0"],"affected":[{"vendor":"Shenzhen Cudy Technology Co., Ltd.","product":"TR3000 1.0","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.5.42","versionType":"semver"},{"version":"2.5.42","status":"unaffected","versionType":"semver"}]}],"references":["https://www.cudy.com/en-us/pages/download-center/tr3000-1-0","https://d1jvyy13vm72kv.cloudfront.net/device/upgrade/m_upgrade_TR3000_256MB_Flash-R103-2.5.42-20261103-160202-sysupgrade_82672.zip","https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-dnsmasq-configuration-injection-via-net-set-dhcp"],"weaknesses":["CWE-93"],"ingestedAt":"2026-11-13T15:44:06.325Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/129xxx/CVE-2026-129104.json","commit":"576d2b26d866bb59f15658a7b702cf18a922cb02","baselineCommit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-129104","state":"PUBLISHED","datePublished":"2026-11-13T15:38:28.886Z","dateUpdated":"2026-11-13T15:38:28.886Z","assignerShortName":"VulnCheck","assignerOrgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateReserved":"2026-11-13T15:31:00.207Z"},"containers":{"cna":{"title":"Cudy TR3000 before 2.5.42 dnsmasq Configuration Injection via net.set_dhcp","descriptions":[{"lang":"en","value":"Cudy TR3000 before 2.5.42 contains a dnsmasq configuration injection vulnerability that allows authenticated administrators to inject directives by embedding a newline in the net.set_dhcp leasetime field. Attackers can append address= entries via /etc/init.d/dnsmasq to alter DNS answers for LAN clients, or insert invalid lines that stop dnsmasq."}],"affected":[{"vendor":"Shenzhen Cudy Technology Co., Ltd.","product":"TR3000 1.0","defaultStatus":"unaffected","versions":[{"version":"0","status":"affected","lessThan":"2.5.42","versionType":"semver"},{"version":"2.5.42","status":"unaffected","versionType":"semver"}]}],"references":[{"url":"https://www.cudy.com/en-us/pages/download-center/tr3000-1-0","tags":["release-notes"],"name":"Cudy TR3000 1.0 Download Center"},{"url":"https://d1jvyy13vm72kv.cloudfront.net/device/upgrade/m_upgrade_TR3000_256MB_Flash-R103-2.5.42-20261103-160202-sysupgrade_82672.zip","tags":["patch"],"name":"Cudy TR3000 Firmware 2.5.42"},{"url":"https://www.vulncheck.com/advisories/cudy-tr3000-before-2.5.42-dnsmasq-configuration-injection-via-net-set-dhcp","name":"VulnCheck Advisory: Cudy TR3000 before 2.5.42 dnsmasq Configuration Injection via net.set_dhcp","tags":["third-party-advisory"]}],"metrics":[{"format":"CVSS","cvssV4_0":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N","attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"HIGH","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"HIGH","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7,"baseSeverity":"HIGH"}},{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"HIGH","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"NONE","integrityImpact":"HIGH","availabilityImpact":"HIGH","baseScore":6.5,"baseSeverity":"MEDIUM"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-93","lang":"en","description":"Improper Neutralization of CRLF Sequences ('CRLF Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"VulnCheck","orgId":"83251b91-4cc7-4094-a5c7-464a1b83ea10","dateUpdated":"2026-11-13T15:38:28.886Z"},"datePublic":"2026-11-13T00:00:00.000Z","x_generator":{"engine":"vulncheck-endgame"}}}}}