Review reviewHigh

CVE-2026-20452

MediaTek, Inc. MediaTek chipset, mt6890 firmware, mt6890

In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480138; Issue ID: MSV-6295.

CVSS
8
EPSS
0.43%
35.8% percentile
CISA KEV
Not listed
Published
2026.06.01
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.43%
Technical severityCVSS 8

Vulnerability overview

In wlan AP driver, there is a possible memory corruption due to a heap buffer overflow. This could lead to remote (proximal/adjacent) code execution with User execution privileges needed. User interaction is not needed for exploitation. Patch ID: WCNCR00480138; Issue ID: MSV-6295.

Affected product and versions

Product
MediaTek, Inc. MediaTek chipset, mt6890 firmware, mt6890
Affected versions
>= MT6890, >= MT7615, >= MT7915, >= MT7916, >= MT7981, >= MT7986, >= MT7990, >= MT7992, >= MT7993
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that MediaTek, Inc. MediaTek chipset, mt6890 firmware, mt6890 and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
CWE-122
CVE-2026-20452 — MediaTek, Inc. MediaTek chipset, mt6890 firmware, mt6890 | SECUFOCUS NOW