{"id":"CVE-2026-45255","aliases":["EUVD-2026-31263","GHSA-qj4f-cpgw-vqx9"],"status":"published","title":"Remote code execution via installer Wi-Fi access point scans","description":"When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network.  This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell.  As a result, a suitably crafted network name can be used to execute commands via a subshell.\n\nThe problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig.  The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan.  Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:A/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":0.00305,"percentile":0.23522,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-78"],"published":"2026-05-21T09:27:20Z","modified":"2026-07-23T16:10:00Z","products":[{"vendor":"freebsd","product":"freebsd"}],"references":[{"url":"https://security.freebsd.org/advisories/FreeBSD-SA-26:23.bsdinstall.asc","tags":["vendor-advisory","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-45255"},{"url":"https://github.com/advisories/GHSA-qj4f-cpgw-vqx9"}],"sources":{"cve":[{"id":"CVE-2026-45255","title":"Remote code execution via installer Wi-Fi access point scans","description":"When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network.  This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell.  As a result, a suitably crafted network name can be used to execute commands via a subshell.\n\nThe problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig.  The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan.  Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.","status":"published","published":"2026-05-21T09:27:20.431Z","modified":"2026-05-22T03:55:39.175Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"adp"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T13:46:43.922571Z"}],"euvd":[{"id":"EUVD-2026-31263","description":"When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network.  This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell.  As a result, a suitably crafted network name can be used to execute commands via a subshell.\n\nThe problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig.  The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan.  Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.","status":"published","published":"2026-05-21T09:27:20Z","modified":"2026-05-22T03:55:39Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:21:13.357667Z"}],"ghsa":[{"id":"GHSA-qj4f-cpgw-vqx9","title":"When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list...","description":"When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network.  This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell.  As a result, a suitably crafted network name can be used to execute commands via a subshell.\n\nThe problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig.  The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan.  Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.","status":"published","published":"2026-05-21T12:31:45Z","modified":"2026-05-21T15:35:16Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:08:15.106873Z"}],"nvd":[{"id":"CVE-2026-45255","description":"When bsdinstall or bsdconfig are prompted to scan for nearby Wi-Fi networks, they build up a list of network names and use bsddialog(1) to prompt the user to select a network.  This is implemented using a shell script, and the code which handled network names was not careful to prevent expansion by the shell.  As a result, a suitably crafted network name can be used to execute commands via a subshell.\n\nThe problem can be exploited to execute code as root on the system running bsdinstall or bsdconfig.  The attacker would need to create an access point with a specially crafted name and be within range of a Wi-Fi scan.  Note that bsdinstall and bsdconfig are vulnerable as soon as the user prompts them to scan for nearby networks; they do not need to actually select the malicious network.","status":"published","published":"2026-05-21T10:16:26.497Z","modified":"2026-07-23T16:10:00.137Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:12:19.752984Z"}]}}