{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-20423", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "state": "PUBLISHED", "assignerShortName": "MediaTek", "dateReserved": "2025-11-03T01:30:59.010Z", "datePublished": "2026-03-02T08:37:41.026Z", "dateUpdated": "2026-03-03T16:15:45.688Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-03-02T08:37:41.026Z"}, "descriptions": [{"lang": "en", "value": "In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956."}], "affected": [{"vendor": "MediaTek, Inc.", "product": "MT7902, MT7920, MT7921, MT7922, MT7925, MT7927", "versions": [{"version": "NB SDK release 3.8 and before", "status": "affected"}]}], "references": [{"url": "https://corp.mediatek.com/product-security-bulletin/March-2026"}], "problemTypes": [{"descriptions": [{"type": "CWE", "lang": "en", "cweId": "CWE-749", "description": "CWE-749 Exposed Dangerous Method or Function"}]}], "x_generator": {"engine": "cvelib 1.8.0"}}, "adp": [{"metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"timestamp": "2026-03-03T04:56:07.773095Z", "id": "CVE-2026-20423", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-03T16:15:45.688Z"}}]}}

{"dataType": "CVE_RECORD", "containers": {"adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"cvssV3_1": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.8, "attackVector": "LOCAL", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "LOW", "confidentialityImpact": "HIGH"}}, {"other": {"type": "ssvc", "content": {"id": "CVE-2026-20423", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2026-03-03T04:56:07.773095Z"}}}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2026-03-02T18:47:45.450Z"}}], "cna": {"affected": [{"vendor": "MediaTek, Inc.", "product": "MT7902, MT7920, MT7921, MT7922, MT7925, MT7927", "versions": [{"status": "affected", "version": "NB SDK release 3.8 and before"}]}], "references": [{"url": "https://corp.mediatek.com/product-security-bulletin/March-2026"}], "x_generator": {"engine": "cvelib 1.8.0"}, "descriptions": [{"lang": "en", "value": "In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956."}], "problemTypes": [{"descriptions": [{"lang": "en", "type": "CWE", "cweId": "CWE-749", "description": "CWE-749 Exposed Dangerous Method or Function"}]}], "providerMetadata": {"orgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "shortName": "MediaTek", "dateUpdated": "2026-03-02T08:37:41.026Z"}}}, "cveMetadata": {"cveId": "CVE-2026-20423", "state": "PUBLISHED", "dateUpdated": "2026-03-03T16:15:45.688Z", "dateReserved": "2025-11-03T01:30:59.010Z", "assignerOrgId": "ee979b05-11f8-4f25-a7e0-a1fa9c190374", "datePublished": "2026-03-02T08:37:41.026Z", "assignerShortName": "MediaTek"}, "dataVersion": "5.2"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mediatek:nbiot_sdk:*:*:*:*:*:*:*:*", "matchCriteriaId": "513F2D0C-0D1C-4C90-AA0F-4F43BF08EB0C", "versionEndIncluding": "3.8", "vulnerable": true}], "negate": false, "operator": "OR"}, {"cpeMatch": [{"criteria": "cpe:2.3:h:mediatek:mt7902:-:*:*:*:*:*:*:*", "matchCriteriaId": "91DEA745-47A8-43F1-A1B2-F53F651A99EF", "vulnerable": false}, {"criteria": "cpe:2.3:h:mediatek:mt7920:-:*:*:*:*:*:*:*", "matchCriteriaId": "140DAC08-96E9-47D3-BC2E-65E999DCFD50", "vulnerable": false}, {"criteria": "cpe:2.3:h:mediatek:mt7921:-:*:*:*:*:*:*:*", "matchCriteriaId": "32AFEA0A-FFE2-4EA9-8B51-7E3E75DE65CC", "vulnerable": false}, {"criteria": "cpe:2.3:h:mediatek:mt7922:-:*:*:*:*:*:*:*", "matchCriteriaId": "EA2A6813-7138-441E-A9E4-FF62FCBD797A", "vulnerable": false}, {"criteria": "cpe:2.3:h:mediatek:mt7925:-:*:*:*:*:*:*:*", "matchCriteriaId": "27CFC9DF-2F4C-469A-8A19-A260B1134CFE", "vulnerable": false}, {"criteria": "cpe:2.3:h:mediatek:mt7927:-:*:*:*:*:*:*:*", "matchCriteriaId": "05525018-AFE0-415C-A71C-A77922C7D637", "vulnerable": false}], "negate": false, "operator": "OR"}], "operator": "AND"}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In wlan STA driver, there is a possible out of bounds write due to a missing bounds check. This could lead to local escalation of privilege with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465314; Issue ID: MSV-4956."}], "id": "CVE-2026-20423", "lastModified": "2026-03-03T17:16:18.047", "metrics": {"cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 7.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}]}, "published": "2026-03-02T09:16:15.340", "references": [{"source": "security@mediatek.com", "tags": ["Vendor Advisory"], "url": "https://corp.mediatek.com/product-security-bulletin/March-2026"}], "sourceIdentifier": "security@mediatek.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-749"}], "source": "security@mediatek.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MT7902, MT7920, MT7921, MT7922, MT7925, MT7927", "source": "cna", "vendor": "MediaTek, Inc."}, "product": "mt7902", "vendor": "mediatek"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MT7902, MT7920, MT7921, MT7922, MT7925, MT7927", "source": "cna", "vendor": "MediaTek, Inc."}, "product": "mt7920", "vendor": "mediatek"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MT7902, MT7920, MT7921, MT7922, MT7925, MT7927", "source": "cna", "vendor": "MediaTek, Inc."}, "product": "mt7921", "vendor": "mediatek"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MT7902, MT7920, MT7921, MT7922, MT7925, MT7927", "source": "cna", "vendor": "MediaTek, Inc."}, "product": "mt7922", "vendor": "mediatek"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MT7902, MT7920, MT7921, MT7922, MT7925, MT7927", "source": "cna", "vendor": "MediaTek, Inc."}, "product": "mt7925", "vendor": "mediatek"}, {"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "generic", "value": "[0,3.8)"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "MT7902, MT7920, MT7921, MT7922, MT7925, MT7927", "source": "cna", "vendor": "MediaTek, Inc."}, "product": "mt7927", "vendor": "mediatek"}], "created": "2026-03-03T08:45:55.790794+00:00", "updated": "2026-03-03T08:45:55.790963+00:00", "vendors": ["mediatek", "mediatek$PRODUCT$mt7902", "mediatek$PRODUCT$mt7920", "mediatek$PRODUCT$mt7921", "mediatek$PRODUCT$mt7922", "mediatek$PRODUCT$mt7925", "mediatek$PRODUCT$mt7927"]}