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8.8
Out-of-bounds write flaw in Wi-Fi AP software allows unauthorized access
CVE-2026-20430
Summary
A flaw in the Wi-Fi access point software could allow hackers to gain unauthorized access to the system without needing to interact with it. This could give them higher-level privileges, potentially allowing them to make changes to the system. To fix this, you should apply a patch from the manufacturer.
What to do
No fix is available yet. Check with your software vendor for updates.
Affected software
| Vendor | Product | Affected versions | Fix available |
|---|---|---|---|
| mediatek | software_development_kit | <= 7.6.7.3 | – |
| openwrt | openwrt | 19.07.0 | – |
| openwrt | openwrt | 21.02.0 | – |
| openwrt | openwrt | 23.05.0 | – |
Original title
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 privilege...
Original 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.
nvd CVSS3.1
8.8
Vulnerability type
CWE-787
Out-of-bounds Write
- https://corp.mediatek.com/product-security-bulletin/March-2026 Vendor Advisory
Published: 2 Mar 2026 · Updated: 13 Mar 2026 · First seen: 6 Mar 2026