CVE-2026-20457: CWE-476 NULL Pointer Dereference in MediaTek, Inc. MediaTek chipset
CVE-2026-20457 is a vulnerability in MediaTek chipsets caused by improper input validation in the modem component, leading to a NULL pointer dereference. This flaw can cause a system crash resulting in a remote denial of service (DoS) if a user equipment (UE) connects to a rogue base station controlled by an attacker. Exploitation does not require user interaction or additional execution privileges. Multiple MediaTek chipset models are affected. No official patch or remediation guidance has been provided yet.
AI Analysis
Technical Summary
This vulnerability (CVE-2026-20457) involves a NULL pointer dereference (CWE-476) in the modem of MediaTek chipsets due to improper input validation. An attacker controlling a rogue base station can trigger a system crash remotely, causing denial of service on affected devices. Exploitation requires no user interaction or elevated privileges. The issue is identified by MediaTek with Patch ID MOLY01826924 and Issue ID MSV-7301, but no patch or remediation level has been disclosed. The affected products include a broad range of MediaTek chipset models listed explicitly.
Potential Impact
The impact is a remote denial of service condition caused by a system crash on affected MediaTek chipsets. This can disrupt normal device operation when connected to a malicious base station. There is no indication of privilege escalation or code execution beyond denial of service. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or mitigation level has been published, users and administrators should monitor MediaTek's advisories for updates. No specific workaround or mitigation is currently documented.
CVE-2026-20457: CWE-476 NULL Pointer Dereference in MediaTek, Inc. MediaTek chipset
Description
CVE-2026-20457 is a vulnerability in MediaTek chipsets caused by improper input validation in the modem component, leading to a NULL pointer dereference. This flaw can cause a system crash resulting in a remote denial of service (DoS) if a user equipment (UE) connects to a rogue base station controlled by an attacker. Exploitation does not require user interaction or additional execution privileges. Multiple MediaTek chipset models are affected. No official patch or remediation guidance has been provided yet.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability (CVE-2026-20457) involves a NULL pointer dereference (CWE-476) in the modem of MediaTek chipsets due to improper input validation. An attacker controlling a rogue base station can trigger a system crash remotely, causing denial of service on affected devices. Exploitation requires no user interaction or elevated privileges. The issue is identified by MediaTek with Patch ID MOLY01826924 and Issue ID MSV-7301, but no patch or remediation level has been disclosed. The affected products include a broad range of MediaTek chipset models listed explicitly.
Potential Impact
The impact is a remote denial of service condition caused by a system crash on affected MediaTek chipsets. This can disrupt normal device operation when connected to a malicious base station. There is no indication of privilege escalation or code execution beyond denial of service. No known exploits are reported in the wild at this time.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or mitigation level has been published, users and administrators should monitor MediaTek's advisories for updates. No specific workaround or mitigation is currently documented.
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: 6a448b4d27e9c79719e6c5e1
Added to database: 07/01/2026, 03:36:45 UTC
Last enriched: 07/01/2026, 03:52:35 UTC
Last updated: 07/01/2026, 04:18:32 UTC
Views: 5
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.