{"id":"CVE-2026-42511","aliases":["EUVD-2026-26350","GHSA-xg3v-hpwh-q32x"],"status":"published","title":"Remote code execution via malicious DHCP options","description":"The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives.  When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.\n\nA rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.","severity":{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp","from":"cve"},"epss":{"day":"2026-11-11","score":0.00431,"percentile":0.37706,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-149"],"published":"2026-04-30T06:56:36Z","modified":"2026-11-11T21:10:00Z","products":[{"vendor":"freebsd","product":"freebsd"}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:12.dhclient.asc","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42511"},{"url":"https://github.com/advisories/GHSA-xg3v-hpwh-q32x"}],"sources":{"cve":[{"id":"CVE-2026-42511","title":"Remote code execution via malicious DHCP options","description":"The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives.  When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.\n\nA rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.","status":"published","published":"2026-04-30T06:56:36.929Z","modified":"2026-05-01T15:25:37.8Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-149"],"updated_at":"2026-11-02T13:40:23.731501Z"}],"euvd":[{"id":"EUVD-2026-26350","description":"The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives.  When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.\n\nA rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.","status":"published","published":"2026-04-30T06:56:36Z","modified":"2026-05-01T15:25:37Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T19:05:18.723006Z"}],"ghsa":[{"id":"GHSA-xg3v-hpwh-q32x","title":"The BOOTP file field is written to the lease file without escaping embedded double-quotes,...","description":"The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives.  When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.\n\nA rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.","status":"published","published":"2026-04-30T09:30:24Z","modified":"2026-04-30T15:31:40Z","cvss":[{"version":"3.1","score":7.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L","level":"high"}],"cwes":["CWE-149"],"updated_at":"2026-11-02T15:07:52.236911Z"}],"nvd":[{"id":"CVE-2026-42511","description":"The BOOTP file field is written to the lease file without escaping embedded double-quotes, allowing injection of arbitrary dhclient.conf directives.  When the lease file is subsequently re-parsed by dhclient, e.g., after a system restart, an attacker-controlled field from the lease is passed to dhclient-script(8), which evaluates it.\n\nA rogue DHCP server may be able to execute arbirary code as root on a system running dhclient.","status":"published","published":"2026-04-30T07:16:37.29Z","modified":"2026-11-11T21:10:00.2Z","cvss":[{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-149"],"updated_at":"2026-11-11T23:26:36.997374Z"}]}}