CVE-2026-20418

Name: CVE-2026-20418
Creator: NVD / NIST
Published: 2026-02-02T09:15:56.853+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.33%

Last modified Jun 17, 2026

CVE-2026-20418 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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. EPSS estimates a 0.33% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.33%

25.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Google	Matter	<= 1.4

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-2026-20418?

How severe is CVE-2026-20418?

CVE-2026-20418 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.33% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20418?

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-2026-20418?

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

Scan your code now

Source: NVD / NIST