{"api_version":"1","generated_at":"2026-11-11T06:27:16+00:00","cve":"CVE-2026-20549","urls":{"html":"https://cve.report/CVE-2026-20549","api":"https://cve.report/api/cve/CVE-2026-20549.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-20549","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-20549"},"summary":{"title":"CVE-2026-20549","description":"In Modem, there is a possible out of bounds write due to improper input validation. 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: MOLY01775865; Issue ID: MSV-8895.","state":"PUBLISHED","assigner":"MediaTek","published_at":"2026-11-02 03:17:31","updated_at":"2026-11-04 05:18:53"},"problem_types":["CWE-787","CWE-787 CWE-787 Out-of-bounds Write"],"metrics":[{"version":"3.1","source":"ADP","type":"DECLARED","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","data":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},{"version":"3.1","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","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","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"}}],"references":[{"url":"https://www.mediatek.com/product-security-bulletin/November-2026","name":"https://www.mediatek.com/product-security-bulletin/November-2026","refsource":"security@mediatek.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-20549","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-20549","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT2716","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT2735","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT2737","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6739","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6761","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6762","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6763","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6765","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6767","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6768","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6769","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6771","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6779","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6781","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6783","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6785","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6789","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6833","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6835","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6853","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6855","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6858","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6873","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6875","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6877","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6878","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6879","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6880","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6881","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6883","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6885","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6886","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6889","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6890","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6891","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6893","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6895","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6896","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6897","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6899","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6980","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6982","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6983","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6985","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6986","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6988","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6989","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6990","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6991","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT6993","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8668","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8676","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8678","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8755","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8765","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8766","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8766R","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8768","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8771","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8775","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8781","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8786","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8788E","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8791","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8791T","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8792","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8793","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8796","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8797","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8798","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8863","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8873","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8875","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8883","platforms":[]},{"source":"CNA","vendor":"MediaTek, Inc.","product":"MediaTek chipset","version":"affected MT8893","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"20549","cve":"CVE-2026-20549","epss":"0.002420000","percentile":"0.154830000","score_date":"2026-11-04","updated_at":"2026-11-05 00:04:17"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"adp":[{"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"ADJACENT_NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"NONE","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}},{"other":{"content":{"id":"CVE-2026-20549","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","timestamp":"2026-11-02T00:00:00+00:00","version":"2.0.3"},"type":"ssvc"}}],"providerMetadata":{"dateUpdated":"2026-11-04T04:55:33.531Z","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP"},"title":"CISA ADP Vulnrichment"}],"cna":{"affected":[{"defaultStatus":"unaffected","product":"MediaTek chipset","vendor":"MediaTek, Inc.","versions":[{"status":"affected","version":"MT2716"},{"status":"affected","version":"MT2735"},{"status":"affected","version":"MT2737"},{"status":"affected","version":"MT6739"},{"status":"affected","version":"MT6761"},{"status":"affected","version":"MT6762"},{"status":"affected","version":"MT6763"},{"status":"affected","version":"MT6765"},{"status":"affected","version":"MT6767"},{"status":"affected","version":"MT6768"},{"status":"affected","version":"MT6769"},{"status":"affected","version":"MT6771"},{"status":"affected","version":"MT6779"},{"status":"affected","version":"MT6781"},{"status":"affected","version":"MT6783"},{"status":"affected","version":"MT6785"},{"status":"affected","version":"MT6789"},{"status":"affected","version":"MT6833"},{"status":"affected","version":"MT6835"},{"status":"affected","version":"MT6853"},{"status":"affected","version":"MT6855"},{"status":"affected","version":"MT6858"},{"status":"affected","version":"MT6873"},{"status":"affected","version":"MT6875"},{"status":"affected","version":"MT6877"},{"status":"affected","version":"MT6878"},{"status":"affected","version":"MT6879"},{"status":"affected","version":"MT6880"},{"status":"affected","version":"MT6881"},{"status":"affected","version":"MT6883"},{"status":"affected","version":"MT6885"},{"status":"affected","version":"MT6886"},{"status":"affected","version":"MT6889"},{"status":"affected","version":"MT6890"},{"status":"affected","version":"MT6891"},{"status":"affected","version":"MT6893"},{"status":"affected","version":"MT6895"},{"status":"affected","version":"MT6896"},{"status":"affected","version":"MT6897"},{"status":"affected","version":"MT6899"},{"status":"affected","version":"MT6980"},{"status":"affected","version":"MT6982"},{"status":"affected","version":"MT6983"},{"status":"affected","version":"MT6985"},{"status":"affected","version":"MT6986"},{"status":"affected","version":"MT6988"},{"status":"affected","version":"MT6989"},{"status":"affected","version":"MT6990"},{"status":"affected","version":"MT6991"},{"status":"affected","version":"MT6993"},{"status":"affected","version":"MT8668"},{"status":"affected","version":"MT8676"},{"status":"affected","version":"MT8678"},{"status":"affected","version":"MT8755"},{"status":"affected","version":"MT8765"},{"status":"affected","version":"MT8766"},{"status":"affected","version":"MT8766R"},{"status":"affected","version":"MT8768"},{"status":"affected","version":"MT8771"},{"status":"affected","version":"MT8775"},{"status":"affected","version":"MT8781"},{"status":"affected","version":"MT8786"},{"status":"affected","version":"MT8788E"},{"status":"affected","version":"MT8791"},{"status":"affected","version":"MT8791T"},{"status":"affected","version":"MT8792"},{"status":"affected","version":"MT8793"},{"status":"affected","version":"MT8796"},{"status":"affected","version":"MT8797"},{"status":"affected","version":"MT8798"},{"status":"affected","version":"MT8863"},{"status":"affected","version":"MT8873"},{"status":"affected","version":"MT8875"},{"status":"affected","version":"MT8883"},{"status":"affected","version":"MT8893"}]}],"descriptions":[{"lang":"en","value":"In Modem, there is a possible out of bounds write due to improper input validation. 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: MOLY01775865; Issue ID: MSV-8895."}],"problemTypes":[{"descriptions":[{"cweId":"CWE-787","description":"CWE-787 Out-of-bounds Write","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-11-02T02:33:06.759Z","orgId":"ee979b05-11f8-4f25-a7e0-a1fa9c190374","shortName":"MediaTek"},"references":[{"url":"https://www.mediatek.com/product-security-bulletin/November-2026"}],"x_generator":{"engine":"cvelib 1.8.0"}}},"cveMetadata":{"assignerOrgId":"ee979b05-11f8-4f25-a7e0-a1fa9c190374","assignerShortName":"MediaTek","cveId":"CVE-2026-20549","datePublished":"2026-11-02T02:33:06.759Z","dateReserved":"2025-11-03T01:30:59.041Z","dateUpdated":"2026-11-04T04:55:33.531Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-11-02 03:17:31","lastModifiedDate":"2026-11-04 05:18:53","problem_types":["CWE-787","CWE-787 CWE-787 Out-of-bounds Write"],"metrics":{"cvssMetricV31":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","baseScore":7.5,"baseSeverity":"HIGH","attackVector":"ADJACENT_NETWORK","attackComplexity":"HIGH","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"HIGH","integrityImpact":"HIGH","availabilityImpact":"HIGH"},"exploitabilityScore":1.6,"impactScore":5.9}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-11-02T00:00:00+00:00","id":"CVE-2026-20549","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"20549","Ordinal":"1","Title":"CVE-2026-20549","CVE":"CVE-2026-20549","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"20549","Ordinal":"1","NoteData":"In Modem, there is a possible out of bounds write due to improper input validation. 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: MOLY01775865; Issue ID: MSV-8895.","Type":"Description","Title":"CVE-2026-20549"}]}}}