CVE-2026-20408

Name: CVE-2026-20408
Creator: NVD / NIST
Published: 2026-02-02T09:15:55.657+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.27%

Last modified Jun 17, 2026

CVE-2026-20408 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. In wlan, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. EPSS estimates a 0.27% chance of exploitation in the next 30 days.

Description

In wlan, there is a possible out of bounds write due to a heap buffer overflow. This could lead to remote (proximal/adjacent) escalation of privilege with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00461651; Issue ID: MSV-4758.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.27%

18.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Mediatek	Software Development Kit	<= 7.6.7.2
Openwrt	Openwrt	19.07.0
Openwrt	Openwrt	21.02.0
Openwrt	Openwrt	23.05.0

References

https://corp.mediatek.com/product-security-bulletin/February-2026Vendor Advisory

Timeline

Published: Feb 2, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20408?

How severe is CVE-2026-20408?

CVE-2026-20408 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.27% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20408?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-20408?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST