CVE-2026-20432 MediaTek, Inc. CVE debrief

Who should care

Users of Mediatek MT2735, MT2737, MT6779, MT6781, MT6783, MT8781, MT8789, and other affected firmware versions should apply patches or mitigations provided by Mediatek. Additionally, operators and security teams managing these affected products should prioritize patching and review compensating controls for exposed systems.

Technical summary

In Modem, there is a possible out of bounds write due to a missing bounds check. This could lead to remote escalation of privilege, if a UE has connected to a rogue base station controlled by the attacker, with no additional execution privileges needed. User interaction is needed for exploitation. The vulnerability exists in Mediatek firmware, affecting products such as MT2735, MT2737, MT6779, MT6781, MT6783, MT8781, and MT8789.

Defensive priority

High priority, as this vulnerability allows for remote escalation of privilege

Recommended defensive actions

• Apply patches or mitigations provided by Mediatek
• Inventory and monitor affected systems
• Implement compensating controls, such as network monitoring and filtering
• Consider exception tracking and retest procedures
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Track exceptions, retest remediated assets, and close the item only after evidence is documented

Evidence notes

Evidence is limited; primary official records indicate a possible out of bounds write due to a missing bounds check in Mediatek firmware. Affected scope and details are not fully known. Defenders should verify Mediatek's official advisory for specific affected products and recommended patches. The CVE record was published on 2026-04-07T04:17:12.413Z and has not been modified since then.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.