CVE-2026-20546

{"id": "CVE-2026-20546", "cveTags": [], "metrics": {"ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2026-20546", "role": "CISA Coordinator", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "version": "2.0.3", "timestamp": "2026-11-02T00:00:00+00:00"}}], "cvssMetricV31": [{"type": "Secondary", "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "cvssData": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 7.5, "attackVector": "ADJACENT_NETWORK", "baseSeverity": "HIGH", "vectorString": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "HIGH", "availabilityImpact": "HIGH", "privilegesRequired": "NONE", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 1.6}]}, "affected": [{"source": "security@mediatek.com", "affectedData": [{"vendor": "MediaTek, Inc.", "product": "MediaTek chipset", "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": "MT6813"}, {"status": "affected", "version": "MT6815"}, {"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"}], "defaultStatus": "unaffected"}]}], "published": "2026-11-02T03:17:31.390", "references": [{"url": "https://www.mediatek.com/product-security-bulletin/November-2026", "source": "security@mediatek.com"}], "vulnStatus": "Awaiting Analysis", "weaknesses": [{"type": "Secondary", "source": "security@mediatek.com", "description": [{"lang": "en", "value": "CWE-787"}]}], "descriptions": [{"lang": "en", "value": "In Modem, there is a possible out of bounds write due to an incorrect 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: MOLY01876654 / MOLY01774038; Issue ID: MSV-9803."}], "lastModified": "2026-11-03T05:18:35.710", "sourceIdentifier": "security@mediatek.com"}