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Vulnerabilities

Security fix · CVE-2026-20408

In wlan, there is a possible out of bounds write due to a heap buffer overflow.

Published Feb 2, 2026 · catalog updated Mar 30, 2026 · MediaTek, Inc. MediaTek chipset

Last checked Nov 4, 2026. A connected source was read within the last 7 days.

Check if you run it

No confirmed exploitation is on record for CVE-2026-20408. EPSS is 0.29%. Act only if a listed version of MediaTek, Inc. MediaTek chipset is installed.

Gaps on this record

  • No version range is stored. A customer cannot check an installed version against this record.
  • No vendor fix or required action is stored. Compare the linked advisory before you change production.

Same product and reporting

Severity
High8.8
Known exploitation
Not in CISA/VulnCheck KEV
EPSS
0.29%
Remediation
Advisory link
Affected products
vendor MediaTek, Inc. MediaTek chipset MT7915

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.

Are you affected?

Enter the version you run. The result uses only the ranges stored on this record.

The check returns affected, not affected, or incomplete. It does not guess a version that is missing from the record.

  • vendor MediaTek, Inc. MediaTek chipset MT7915MT7915

How to fix CVE-2026-20408

What to do

Three questions, each answered from this record only. Confirm the vendor advisory before you patch.

Should you patch?

No confirmed exploitation is on record for CVE-2026-20408. EPSS is 0.29%. Act only if a listed version of MediaTek, Inc. MediaTek chipset is installed.

Which versions are affected?

Compare what you have installed with MediaTek, Inc. MediaTek chipset MT7915 MT7915. Compare the installed version with the linked vendor advisory before you change production.

What should an analyst verify?

No weakness class is stored. EPSS 0.29%. There is no CISA KEV listing. No Exploit-DB or Metasploit reference is linked. Use the source links for the original advisory.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Feb 2, 2026 · EUVD

    Detected

    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.

  2. Mar 30, 2026 · EUVD

    Updated

    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.

Sources

  • CVE.orgVulnerability recordCVE-2026-20408

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2026-20408

    30-day exploitation probability 0.29%

    first.org
  • EUVDVulnerability recordEUVD-2026-5129

    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

    euvd.enisa.europa.eu

References

Freshness

Last verified in this catalog Nov 3, 2026. Significant claims (KEV, EPSS, CVSS, affected ranges) come from the source rows above — open the original publisher for the authoritative advisory.

  • CVE.orgNov 4, 2026
  • FIRST EPSSNov 3, 2026
  • EUVDNov 2, 2026