{"id":"CVE-2026-20586","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-20586","generatedAt":"2026-10-27T23:09:53.940Z","title":"In vdec, there is a possible out of bounds write due to a missing bounds check.","description":"In vdec, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation. Patch ID: ALPS11383899; Issue ID: MSV-9614.","published":"2026-10-05T02:16:54.000Z","lastModified":"2026-10-21T08:16:44.000Z","status":"Analyzed","sourceIdentifier":"security@mediatek.com","cvss":{"version":"3.1","score":8.8,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["mediatek/mt8910 firmware","mediatek/mt2718 firmware","mediatek/mt6768 firmware","mediatek/mt6789 firmware","mediatek/mt6769 firmware","mediatek/mt6833 firmware","mediatek/mt6855 firmware","mediatek/mt6877 firmware","mediatek/mt8186 firmware","mediatek/mt8188 firmware","mediatek/mt8189 firmware","mediatek/mt8195 firmware","mediatek/mt8196 firmware","mediatek/mt8367 firmware","mediatek/mt8391 firmware","mediatek/mt8395 firmware","mediatek/mt8668 firmware","mediatek/mt8676 firmware","mediatek/mt8678 firmware","mediatek/mt8696 firmware","mediatek/mt8781 firmware","mediatek/mt8788e firmware","mediatek/mt8792 firmware","mediatek/mt8793 firmware","mediatek/mt8799 firmware"],"epss":{"score":0.0039,"percentile":0.32839,"date":"2026-10-26","history":[{"date":"2026-10-05","score":0.00382,"percentile":0.29837}]},"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 (0.39%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-05T12:15:08.000Z","detail":{"from":null,"score":"8.8","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 8.8 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-05T02:16:54.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-05T02:16:53.803Z"},"summary":"New CVE, high severity (CVSS 8.8)."}],"references":[{"url":"https://www.mediatek.com/product-security-bulletin/October-2026","tags":["Vendor Advisory"],"source":"security@mediatek.com"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-20586","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."}