CVE-2026-20456

Name: CVE-2026-20456
Creator: NVD / NIST
Published: 2026-06-01T04:16:22.283+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.5/10EPSS 0.10%

Last modified Jun 17, 2026

CVE-2026-20456 is a medium-severity vulnerability rated 5.5/10 on the CVSS scale. In wlan STA driver, there is a possible system crash due to a missing bounds check. This could lead to local denial of service with User execution privileges needed. EPSS estimates a 0.10% chance of exploitation in the next 30 days.

Description

In wlan STA driver, there is a possible system crash due to a missing bounds check. This could lead to local denial of service with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480851; Issue ID: MSV-6338.

Metrics

CVSS 3.1

5.5/10

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

EPSS Probability

0.10%

1.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-787

Affected Software

Vendor	Product	Versions
Mediatek	Mt7902 Firmware	All versions
Mediatek	Mt7920 Firmware	All versions
Mediatek	Mt7921 Firmware	All versions
Mediatek	Mt7922 Firmware	All versions
Mediatek	Mt7925 Firmware	All versions
Mediatek	Mt7927 Firmware	All versions

References

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

Timeline

Published: Jun 1, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-20456?

How severe is CVE-2026-20456?

CVE-2026-20456 has a CVSS score of 5.5/10 (MEDIUM severity). The EPSS model estimates a 0.10% probability of exploitation in the next 30 days.

How do I fix CVE-2026-20456?

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-2026-20456?

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

Scan your code now

Source: NVD / NIST