{"id":"CVE-2023-26246","url":"https://www.cyber-defence.io/tools/cve/CVE-2023-26246","generatedAt":"2026-10-25T05:43:47.209Z","title":"The AppUpgrade binary file, which is used during the firmware installation process, can be modified by an attacker to bypass the digital signature check.","description":"An issue was discovered in the Hyundai Gen5W_L in-vehicle infotainment system AE_E_PE_EUR.S5W_L001.001.211214. The AppUpgrade binary file, which is used during the firmware installation process, can be modified by an attacker to bypass the digital signature check. This indirectly allows an attacker to install custom firmware in the IVI system.","published":"2023-04-27T01:15:08.000Z","lastModified":"2026-06-17T05:42:54.000Z","status":"Analyzed","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":7.8,"severity":"HIGH","vector":"CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-269","CWE-863"],"affected":["hyundai/gen5w l firmware"],"epss":{"score":0.0033,"percentile":0.24974,"date":"2026-10-24","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.33%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://sowhat.iit.cnr.it","tags":["Not Applicable"],"source":"cve@mitre.org"},{"url":"https://sowhat.iit.cnr.it:8443/can-work/chimaera","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://sowhat.iit.cnr.it:8443/can-work/chimaera/-/blob/main/Report/IIT-01-2023.pdf","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://sowhat.iit.cnr.it","tags":["Not Applicable"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://sowhat.iit.cnr.it:8443/can-work/chimaera","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://sowhat.iit.cnr.it:8443/can-work/chimaera/-/blob/main/Report/IIT-01-2023.pdf","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2023-26246","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}