{"id":"CVE-2019-17391","url":"https://www.cyber-defence.io/tools/cve/CVE-2019-17391","generatedAt":"2026-10-27T23:29:46.394Z","title":"Lack of anti-glitch mitigations in the first stage bootloader of the ESP32 chip allows an attacker (with physical access to the device) to read the contents of read-protected eFuses, such as flash encryption and secure boot keys, by injecting a glitch…","description":"An issue was discovered in the Espressif ESP32 mask ROM code 2016-06-08 0 through 2. Lack of anti-glitch mitigations in the first stage bootloader of the ESP32 chip allows an attacker (with physical access to the device) to read the contents of read-protected eFuses, such as flash encryption and secure boot keys, by injecting a glitch into the power supply of the chip shortly after reset.","published":"2019-11-14T21:15:12.000Z","lastModified":"2026-06-17T02:23:52.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":4.6,"severity":"MEDIUM","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N"},"cwe":["CWE-755"],"affected":["espressif/esp32-d0wd firmware","espressif/esp32-d2wd firmware","espressif/esp32-s0wd firmware","espressif/esp32-pico-d4 firmware"],"epss":{"score":0.00235,"percentile":0.14385,"date":"2026-10-26","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.24%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://www.espressif.com/en/news/Security_Advisory_Concerning_Fault_Injection_and_eFuse_Protections","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://www.espressif.com/en/news/Security_Advisory_Concerning_Fault_Injection_and_eFuse_Protections","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2019-17391","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."}