CVE-2026-20434
Out-of-Bounds Write in Modem Enables Remote Privilege Escalation
Publication date: 2026-03-02
Last updated on: 2026-03-02
Assigner: MediaTek, Inc.
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mediatek | lr12a | * |
| mediatek | lr13 | * |
| mediatek | nr15 | * |
| mediatek | nr16 | * |
| mediatek | nr17 | * |
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 modem component where a missing bounds check can cause an out of bounds write.
An attacker controlling a rogue base station can exploit this flaw to remotely escalate privileges on the device.
Exploitation requires the user equipment (UE) to connect to the attacker's rogue base station and some user interaction.
How can this vulnerability impact me? :
The vulnerability can lead to remote escalation of privilege, allowing an attacker to gain higher access rights on the affected device.
This could compromise the security and integrity of the device, potentially allowing unauthorized actions or access to sensitive information.
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