{"id":"CVE-2026-20504","state":"PUBLISHED","title":"In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by t","description":"In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, 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: MOLY00755024; Issue ID: MSV-7865.","publishedAt":"2026-09-07T01:57:18.937Z","updatedAt":"2026-09-07T10:36:49.120Z","severity":{"score":5.3,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","source":"CISA-ADP"},"assigner":"MediaTek","products":["MediaTek, Inc. MediaTek chipset"],"affected":[{"vendor":"MediaTek, Inc.","product":"MediaTek chipset","defaultStatus":"unaffected","versions":[{"version":"MT2735","status":"affected"},{"version":"MT6833","status":"affected"},{"version":"MT6853","status":"affected"},{"version":"MT6855","status":"affected"},{"version":"MT6873","status":"affected"},{"version":"MT6875","status":"affected"},{"version":"MT6877","status":"affected"},{"version":"MT6880","status":"affected"},{"version":"MT6883","status":"affected"},{"version":"MT6885","status":"affected"},{"version":"MT6889","status":"affected"},{"version":"MT6890","status":"affected"},{"version":"MT6891","status":"affected"},{"version":"MT6893","status":"affected"},{"version":"MT8675","status":"affected"},{"version":"MT8771","status":"affected"},{"version":"MT8791","status":"affected"},{"version":"MT8791T","status":"affected"},{"version":"MT8797","status":"affected"}]}],"references":["https://www.mediatek.com/product-security-bulletin/September-2026"],"weaknesses":["CWE-617"],"ingestedAt":"2026-10-29T20:11:10.572Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/20xxx/CVE-2026-20504.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-20504","state":"PUBLISHED","datePublished":"2026-09-07T01:57:18.937Z","dateUpdated":"2026-09-07T10:36:49.120Z","assignerShortName":"MediaTek","assignerOrgId":"ee979b05-11f8-4f25-a7e0-a1fa9c190374","dateReserved":"2025-11-03T01:30:59.028Z"},"containers":{"cna":{"descriptions":[{"lang":"en","value":"In Modem, there is a possible system crash due to a missing bounds check. This could lead to remote denial of service, 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: MOLY00755024; Issue ID: MSV-7865."}],"affected":[{"vendor":"MediaTek, Inc.","product":"MediaTek chipset","defaultStatus":"unaffected","versions":[{"version":"MT2735","status":"affected"},{"version":"MT6833","status":"affected"},{"version":"MT6853","status":"affected"},{"version":"MT6855","status":"affected"},{"version":"MT6873","status":"affected"},{"version":"MT6875","status":"affected"},{"version":"MT6877","status":"affected"},{"version":"MT6880","status":"affected"},{"version":"MT6883","status":"affected"},{"version":"MT6885","status":"affected"},{"version":"MT6889","status":"affected"},{"version":"MT6890","status":"affected"},{"version":"MT6891","status":"affected"},{"version":"MT6893","status":"affected"},{"version":"MT8675","status":"affected"},{"version":"MT8771","status":"affected"},{"version":"MT8791","status":"affected"},{"version":"MT8791T","status":"affected"},{"version":"MT8797","status":"affected"}]}],"references":[{"url":"https://www.mediatek.com/product-security-bulletin/September-2026"}],"problemTypes":[{"descriptions":[{"cweId":"CWE-617","type":"CWE","lang":"en","description":"CWE-617 Reachable Assertion"}]}],"providerMetadata":{"shortName":"MediaTek","orgId":"ee979b05-11f8-4f25-a7e0-a1fa9c190374","dateUpdated":"2026-09-07T01:57:18.937Z"},"x_generator":{"engine":"cvelib 1.8.0"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"cvssV3_1":{"scope":"UNCHANGED","version":"3.1","baseScore":5.3,"attackVector":"ADJACENT_NETWORK","baseSeverity":"MEDIUM","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","integrityImpact":"NONE","userInteraction":"NONE","attackComplexity":"HIGH","availabilityImpact":"HIGH","privilegesRequired":"NONE","confidentialityImpact":"NONE"}},{"other":{"type":"ssvc","content":{"timestamp":"2026-09-07T10:36:46.321155Z","id":"CVE-2026-20504","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-07T10:36:49.120Z"}}]}}}