CVE-2026-20423 is an out-of-bounds write vulnerability in the WLAN STA driver of MediaTek chipsets (mt7902, mt7920, mt7921, mt7922, mt7925, mt7927, nbiot_sdk). This flaw, caused by a missing bounds check, allows for local escalation of privilege. Rated 7.8 HIGH on CVSS, it requires user execution privileges but no user interaction, potentially leading to high impact on confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this vulnerability.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 3.8CPE matchmatch criteria | cpe:2.3:a:mediatek:nbiot_sdk:*:*:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.2 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.