CVE-2026-20430 is an out-of-bounds write vulnerability in the WLAN AP firmware of MediaTek and OpenWrt products, stemming from an incorrect bounds check. This critical flaw, rated 8.8 HIGH on the CVSS scale, allows for remote (proximal/adjacent) escalation of privilege without requiring user interaction or additional execution privileges. While no public exploit code or active exploitation has been observed, and community discussion is minimal, the potential for a complete compromise of confidentiality, integrity, and availability is significant.
| Vendor | Product | Version(s) | CPE |
|---|---|---|---|
<= 7.6.7.3CPE matchmatch criteria | cpe:2.3:a:mediatek:software_development_kit:*:*:*:*:*:*:*:* | ||
19.07.0CPE matchmatch criteria | cpe:2.3:o:openwrt:openwrt:19.07.0:-:*:*:*:*:*:* | ||
21.02.0CPE matchmatch criteria | cpe:2.3:o:openwrt:openwrt:21.02.0:-:*:*:*:*:*:* | ||
23.05.0CPE matchmatch criteria | cpe:2.3:o:openwrt:openwrt:23.05.0:-:*:*:*:*:*:* |
CVSS version used by this source: 3.1
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.
No media coverage found for this CVE.
The average CVE in this peer group has 0.2 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.
Remediation records are not available for this CVE.