Paper/Archive/CVE-2026-20407

CVE-2026-20407

MediaTek, Inc. MediaTek chipset — In wlan STA driver, there is a possible escalation of privilege due to a missing bounds check.

EPSS 0.2%CVSS 9.3

critical.is priorityof 100

CVSS 9.3 (ADP)9.3 / 10 × 3027.9 Not in CISA KEV+300.0 EPSS percentile 7.6.076 × 201.5 No public exploit+100.0 SSVC exploitation: none+100.0

Description · from the CVE record

In wlan STA driver, there is a possible escalation of privilege 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: WCNCR00464377; Issue ID: MSV-4905.

Affected

ProductAffectedFixed inSource

MediaTek chipsetMT7902–CNA

MediaTek chipsetMT7920–CNA

MediaTek chipsetMT7921–CNA

MediaTek chipsetMT7922–CNA

MediaTek chipsetMT7925–CNA

MediaTek chipsetMT7927–CNA

Scores by source

CISA ADP9.3CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

refcorp.mediatek.com/product-security-bulletin/February-2026