CVE-2025-20739
BaseFortify
Publication date: 2025-11-04
Last updated on: 2025-11-05
Assigner: MediaTek, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mediatek | software_development_kit | to 7.6.7.2 (inc) |
| openwrt | openwrt | 19.07.0 |
| openwrt | openwrt | 21.02.0 |
| mediatek | mt6890 | * |
| mediatek | mt7615 | * |
| mediatek | mt7622 | * |
| mediatek | mt7663 | * |
| mediatek | mt7915 | * |
| mediatek | mt7916 | * |
| mediatek | mt7981 | * |
| mediatek | mt7986 | * |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-787 | The product writes data past the end, or before the beginning, of the intended buffer. |
| CWE-121 | A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is an out of bounds write in the wlan AP driver caused by an incorrect bounds check. It means that the software writes data outside the intended memory area, which can lead to unexpected behavior or security issues. Exploiting this vulnerability could allow a malicious actor who already has System privilege to escalate their privileges locally without needing any user interaction.
How can this vulnerability impact me? :
If exploited, this vulnerability could allow a malicious actor with existing System privileges to escalate their privileges further on the affected system. This could lead to greater control over the system, potentially allowing them to execute unauthorized actions or compromise system integrity.
What immediate steps should I take to mitigate this vulnerability?
Apply the patch identified as WCNCR00435340 provided by the vendor to fix the out of bounds write issue in the wlan AP driver. Since exploitation requires local system privilege, ensure that only trusted users have such privileges and monitor for any unusual local activity until the patch is applied.