{"id":"CVE-2020-16273","url":"https://www.cyber-defence.io/tools/cve/CVE-2020-16273","generatedAt":"2026-10-27T21:20:08.026Z","title":"An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized.","description":"In Arm software implementing the Armv8-M processors (all versions), the stack selection mechanism could be influenced by a stack-underflow attack in v8-M TrustZone based processors. An attacker can cause a change to the stack pointer used by the Secure World from a non-secure application if the stack is not initialized. This vulnerability affects only the software that is based on Armv8-M processors with the Security Extension.","published":"2020-11-12T19:15:15.000Z","lastModified":"2026-06-17T02:57:59.000Z","status":"Modified","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-191"],"affected":["arm/armv8-m firmware"],"epss":{"score":0.00345,"percentile":0.27873,"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":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.34%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://developer.arm.com/support/arm-security-updates/armv8-m-stack-sealing","tags":["Vendor Advisory"],"source":"cve@mitre.org"},{"url":"https://developer.arm.com/support/arm-security-updates/armv8-m-stack-sealing","tags":["Vendor Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2020-16273","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."}