CVE-2026-20459: CWE-288 Authentication Bypass Using an Alternate Path or Channel in MediaTek, Inc. MediaTek chipset
In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01816800; Issue ID: MSV-6842.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20459) affects multiple MediaTek chipset models and involves improper input validation in the modem component. An attacker controlling a rogue base station can trigger a system crash remotely, resulting in a denial of service condition on the affected device. The vulnerability is classified under CWE-288 (Authentication Bypass Using an Alternate Path or Channel). No information about an official patch or remediation level is provided in the available data.
Potential Impact
The impact is a remote denial of service (DoS) caused by a system crash on affected MediaTek chipsets. There is no indication of confidentiality or integrity compromise. Exploitation requires the UE to connect to a malicious base station, but no user interaction or elevated privileges are needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation is indicated in the provided information. Users and administrators should monitor MediaTek advisories for updates and apply patches once available.
CVE-2026-20459: CWE-288 Authentication Bypass Using an Alternate Path or Channel in MediaTek, Inc. MediaTek chipset
Description
In Modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is not needed for exploitation. Patch ID: MOLY01816800; Issue ID: MSV-6842.
CVSS v3.1
Score 5.3medium
Affected software
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20459) affects multiple MediaTek chipset models and involves improper input validation in the modem component. An attacker controlling a rogue base station can trigger a system crash remotely, resulting in a denial of service condition on the affected device. The vulnerability is classified under CWE-288 (Authentication Bypass Using an Alternate Path or Channel). No information about an official patch or remediation level is provided in the available data.
Potential Impact
The impact is a remote denial of service (DoS) caused by a system crash on affected MediaTek chipsets. There is no indication of confidentiality or integrity compromise. Exploitation requires the UE to connect to a malicious base station, but no user interaction or elevated privileges are needed.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or temporary mitigation is indicated in the provided information. Users and administrators should monitor MediaTek advisories for updates and apply patches once available.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- MediaTek
- Date Reserved
- 2025-11-03T01:30:59.014Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a448b4d27e9c79719e6c5e7
Added to database: 07/01/2026, 03:36:45 UTC
Last enriched: 07/08/2026, 13:05:12 UTC
Last updated: 08/15/2026, 00:41:11 UTC
Views: 91
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