by Kastro
Paper/Archive/CVE-2026-20418

CVE-2026-20418

MediaTek, Inc. MediaTek chipset — In Thread, there is a possible out of bounds write due to a missing bounds check.

EPSS 0.4%CVSS 9.8
critical.is priorityof 100
35
CVSS 9.8 (ADP)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 29.2.292 × 205.8No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

In Thread, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00465153; Issue ID: MSV-4927.

Affected

ProductAffectedFixed inSource
MediaTek chipsetMT7931–CNA
MediaTek chipsetMT7933–CNA

Scores by source

CISA ADP9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADPSSVCExploitation: none · Automatable: no · Technical impact: total

References

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