← Vulnerability feed

Vulnerability record · CVE-2026-20452 · published 1 June 2026

CVE-2026-20452: Mediatek mt6890 firmware heap-based buffer overflow vulnerability

Mediatek · Mt6890 Firmware

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.

8.0 CVSS 3.1 High EPSS 0.43% · top 64.7% CWE-122 · Heap-based buffer overflow
8.0CVSS 3.1 base score
0.43%EPSS exploitation probability, 30 days
NoNot in CISA KEV
9Affected product versions listed by NVD
1References
22 Jul 2026Last modified by NVD

Description

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

Affected products

9 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

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

Track CVE-2026-20452 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

Start free Open in platform

Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2026-20433Mediatek mt2735 firmware out-of-bounds write vulnerabilityIn Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has conne…EPSS 0.34%8.8CVE-2021-35055Mediatek mt7603e firmware out-of-bounds write vulnerabilityMediaTek microchips, as used in NETGEAR devices through 2021-11-11 and other devices, mishandle the WPS (Wi-Fi Protected Setup) protocol. (Affected C…EPSS 1.2%8.8CVE-2021-37560Mediatek mt7603e firmware out-of-bounds write vulnerabilityMediaTek microchips, as used in NETGEAR devices through 2021-11-11 and other devices, mishandle the WPS (Wi-Fi Protected Setup) protocol. (Affected C…EPSS 1.2%8.8CVE-2021-37561Mediatek mt7603e firmware out-of-bounds write vulnerabilityMediaTek microchips, as used in NETGEAR devices through 2021-11-11 and other devices, mishandle the WPS (Wi-Fi Protected Setup) protocol. (Affected C…EPSS 1.2%8.8CVE-2021-37563Mediatek mt7603e firmware out-of-bounds write vulnerabilityMediaTek microchips, as used in NETGEAR devices through 2021-11-11 and other devices, mishandle the WPS (Wi-Fi Protected Setup) protocol. (Affected C…EPSS 1.2%8.8CVE-2021-37566Mediatek mt7603e firmware out-of-bounds write vulnerabilityMediaTek microchips, as used in NETGEAR devices through 2021-11-11 and other devices, mishandle IEEE 1905 protocols. (Affected Chipsets MT7603E, MT76…EPSS 1.3%8.8CVE-2021-37568Mediatek mt7603e firmware out-of-bounds write vulnerabilityMediaTek microchips, as used in NETGEAR devices through 2021-11-11 and other devices, mishandle IEEE 1905 protocols. (Affected Chipsets MT7603E, MT76…EPSS 1.2%8.8CVE-2021-37569Mediatek mt7603e firmware out-of-bounds write vulnerabilityMediaTek microchips, as used in NETGEAR devices through 2021-11-11 and other devices, mishandle IEEE 1905 protocols. (Affected Chipsets MT7603E, MT76…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2026-20452), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.