CVE-2026-20430
Out-of-Bounds Write in WLAN AP Firmware Enables Remote Privilege Escalation
Publication date: 2026-03-02
Last updated on: 2026-03-02
Assigner: MediaTek, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| openwrt | openwrt | 19.07.0 |
| openwrt | openwrt | 21.02.0 |
| openwrt | openwrt | 23.05.0 |
| mediatek | software_development_kit | to 7.6.7.3 (inc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability exists in the wlan AP firmware where an incorrect bounds check can cause an out of bounds write.
This means that the software may write data outside the intended memory area, which can lead to unexpected behavior.
Exploitation of this flaw can allow a remote attacker who is physically close (proximal or adjacent) to escalate their privileges without needing any additional execution privileges or user interaction.
How can this vulnerability impact me? :
The impact of this vulnerability is that a nearby attacker could escalate their privileges on the affected device remotely.
This escalation of privilege could allow the attacker to gain higher-level access than intended, potentially compromising the security and integrity of the device.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know