{"id":"CVE-2020-11683","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-11683","generatedAt":"2026-10-27T22:32:36.620Z","title":"It can be exploited by attackers with physical access to forge CMAC values and subsequently boot arbitrary code on an affected system.","description":"A timing side channel was discovered in AT91bootstrap before 3.9.2. It can be exploited by attackers with physical access to forge CMAC values and subsequently boot arbitrary code on an affected system.","published":"2020-09-14T14:15:11.000Z","lastModified":"2026-06-17T02:50:37.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.1","score":6.8,"severity":"MEDIUM","vector":"CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-203"],"affected":["linux4sam/at91bootstrap"],"epss":{"score":0.00514,"percentile":0.43565,"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 (0.51%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/linux4sam/at91bootstrap/commit/7753914c9a622c245f3a3cf2af5e24b6a9904213","tags":["Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://labs.f-secure.com/advisories/microchip-at91bootstrap/","tags":["Exploit","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://github.com/linux4sam/at91bootstrap/commit/7753914c9a622c245f3a3cf2af5e24b6a9904213","tags":["Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://labs.f-secure.com/advisories/microchip-at91bootstrap/","tags":["Exploit","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-11683","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."}