{"id":"CVE-2026-20519","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-20519","generatedAt":"2026-10-28T09:27:49.527Z","title":"In Modem, there is a possible out of bounds write due to a missing bounds check.","description":"In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01778993; Issue ID: MSV-8898.","published":"2026-10-05T02:16:50.000Z","lastModified":"2026-10-08T14:49:49.000Z","status":"Analyzed","sourceIdentifier":"security@mediatek.com","cvss":{"version":"3.1","score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"cwe":["CWE-787"],"affected":["mediatek/mt6833 firmware","mediatek/mt6835 firmware","mediatek/mt6853 firmware","mediatek/mt6855 firmware","mediatek/mt6858 firmware","mediatek/mt6873 firmware","mediatek/mt6875 firmware","mediatek/mt6877 firmware","mediatek/mt6878 firmware","mediatek/mt6879 firmware","mediatek/mt6880 firmware","mediatek/mt6881 firmware","mediatek/mt6883 firmware","mediatek/mt6885 firmware","mediatek/mt6886 firmware","mediatek/mt6889 firmware","mediatek/mt6890 firmware","mediatek/mt6891 firmware","mediatek/mt6893 firmware","mediatek/mt6895 firmware","mediatek/mt6896 firmware","mediatek/mt6897 firmware","mediatek/mt6899 firmware","mediatek/mt6980 firmware","mediatek/mt6982 firmware","mediatek/mt6983 firmware","mediatek/mt6985 firmware","mediatek/mt6986 firmware","mediatek/mt6988 firmware","mediatek/mt6989 firmware","mediatek/mt6990 firmware","mediatek/mt6991 firmware","mediatek/mt6993 firmware","mediatek/mt8668 firmware","mediatek/mt8676 firmware","mediatek/mt8678 firmware","mediatek/mt8755 firmware","mediatek/mt8771 firmware","mediatek/mt8775 firmware","mediatek/mt8791 firmware","mediatek/mt2716 firmware","mediatek/mt2735 firmware","mediatek/mt2737 firmware","mediatek/mt6813 firmware","mediatek/mt6815 firmware","mediatek/mt8791t firmware","mediatek/mt8792 firmware","mediatek/mt8793 firmware","mediatek/mt8796 firmware","mediatek/mt8797 firmware","mediatek/mt8798 firmware","mediatek/mt8863 firmware","mediatek/mt8873 firmware","mediatek/mt8883 firmware","mediatek/mt8893 firmware","mediatek/mt8695 firmware","mediatek/mt8696 firmware"],"epss":{"score":0.00228,"percentile":0.13489,"date":"2026-10-27","history":[{"date":"2026-10-05","score":0.00228,"percentile":0.12355}]},"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 (0.23%). 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":"7.5","severity":"HIGH","fromSeverity":null},"summary":"Now scored CVSS 7.5 HIGH."},{"kind":"new","label":"New CVE","at":"2026-10-05T02:16:50.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-10-05T02:16:50.393Z"},"summary":"New CVE, high severity (CVSS 7.5)."}],"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-2026-20519","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."}