CVE-2026-20408 is a critical heap buffer overflow vulnerability in the WLAN component of MediaTek and OpenWrt products, allowing for remote (proximal/adjacent) escalation of privilege without user interaction. With a CVSS score of 8.8 (HIGH), this flaw presents a significant risk due to its low attack complexity and potential for complete compromise of 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 |
|---|---|---|---|
<= 7.6.7.2CPE 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.