CVE-2026-20430 — Out-of-bounds Write in Software Development KIT

CWE-787 — Out-of-bounds Write3 documents3 sources
Severity
8.8HIGHNVD
EPSS
0.0%
top 93.96%
CISA KEV
Not in KEV
Exploit
No known exploits
Affected products
3
Mediatek Software Development KITMediatek INC Mediatek ChipsetOpenwrt
Timeline
PublishedMar 2

Description

In wlan AP FW, there is a possible out of bounds write due to an incorrect bounds check. 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: WCNCR00467553; Issue ID: MSV-5151.

CVSS vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HExploitability: 2.8 | Impact: 5.9

Affected Packages3 packages

▶NVDopenwrt/openwrt19.07.0, 21.02.0, 23.05.0+2
▶CVEListV5mediatek_inc/mediatek_chipset5 versions+4

🔴Vulnerability Details

2
GHSA
GHSA-373g-vcw5-hqpv: In wlan AP FW, there is a possible out of bounds write due to an incorrect bounds check↗2026-03-02
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CVEList
CVE-2026-20430: In wlan AP FW, there is a possible out of bounds write due to an incorrect bounds check↗2026-03-02
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CVE-2026-20430 — Out-of-bounds Write | cvebase