CVE-2026-20420

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{}

{"analysis": {"en": {"generated_at": "2026-04-16T07:14:30.922116+00:00", "value": {"mitigation_remediation": ["Apply the vendor patch identified by Patch ID MOLY01738313 to correct the modem\u2019s error handling logic.", "Upgrade to the latest MediaTek firmware release that incorporates this patch.", "If the patch is unavailable, restrict device attachment to trusted base stations and monitor for abnormal base\u2011station activity to mitigate potential denial\u2011of\u2011service attempts."], "summary": {"action": "Apply Patch", "impact": "Remote Denial of Service"}, "threat_synthesis": {"affected_systems": "The issue affects MediaTek\u2019 s chipset family, including models MT2735, MT2737, MT6813, MT6815, MT6833, MT6835, MT6853, MT6855, MT6858, MT6873, MT6875, MT6877, MT6878, MT6879, MT6880, MT6883, MT6885, MT6886, MT6889, MT6890, MT6891, MT6893, MT6895, MT6896, MT6897, MT6899, MT6980, MT6983, MT6985, MT6986, MT6989, MT6990, MT6991, MT6993, MT8676, MT8791, as well as the NR15, NR16, NR17 and NR17R firmware lines.", "description_and_impact": "An error handling flaw in the modem component can trigger an out\u2011of\u2011bounds memory read (CWE\u2011125), leading to a system crash. The crash results in a denial of service that does not grant an attacker any execution privileges or require user interaction. The vulnerability is limited to the modem but can potentially disrupt the entire device\u2019s network connectivity.", "risk_and_exploitability": "The CVSS score of 6.5 indicates moderate severity, while an EPSS score of less than 1% suggests a low likelihood of active exploitation at this time. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog. Attackers can exploit it remotely by connecting a user equipment to a rogue base station; no additional privileges or user interaction are needed, making the attack path straightforward for a determined adversary."}}}}, "created": "2026-02-04T12:45:11.128225+00:00", "updated": "2026-04-16T07:15:28.178865+00:00", "vendors": ["mediatek", "mediatek$PRODUCT$mt2735", "mediatek$PRODUCT$mt2737", "mediatek$PRODUCT$mt6813", "mediatek$PRODUCT$mt6815", "mediatek$PRODUCT$mt6833", "mediatek$PRODUCT$mt6835", "mediatek$PRODUCT$mt6853", "mediatek$PRODUCT$mt6855", "mediatek$PRODUCT$mt6858", "mediatek$PRODUCT$mt6873", "mediatek$PRODUCT$mt6875", "mediatek$PRODUCT$mt6877", "mediatek$PRODUCT$mt6878", "mediatek$PRODUCT$mt6879", "mediatek$PRODUCT$mt6880", "mediatek$PRODUCT$mt6883", "mediatek$PRODUCT$mt6885", "mediatek$PRODUCT$mt6886", "mediatek$PRODUCT$mt6889", "mediatek$PRODUCT$mt6890", "mediatek$PRODUCT$mt6891", "mediatek$PRODUCT$mt6893", "mediatek$PRODUCT$mt6895", "mediatek$PRODUCT$mt6896", "mediatek$PRODUCT$mt6897", "mediatek$PRODUCT$mt6899", "mediatek$PRODUCT$mt6980", "mediatek$PRODUCT$mt6983", "mediatek$PRODUCT$mt6985", "mediatek$PRODUCT$mt6986", "mediatek$PRODUCT$mt6989", "mediatek$PRODUCT$mt6990", "mediatek$PRODUCT$mt6991", "mediatek$PRODUCT$mt6993", "mediatek$PRODUCT$mt8676", "mediatek$PRODUCT$mt8791"]}