CVE-2026-20552 MediaTek, Inc. CVE debrief

Who should care

Defenders responsible for devices using Mediatek chipsets, particularly those listed (MT6880, MT6890, MT6813, MT6986, MT6982, MT6980D, MT2735, and MT2737), should assess exposure and prioritize patching. This includes operators, platform administrators, vulnerability management teams, and security teams who manage these devices. They should review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance. Prior

Why it matters

CVE-2026-20552 is a possible out of bounds write in ccci that could lead to remote denial of service. Defenders should prioritize patching and verifying affected devices, particularly those using Mediatek chipsets.

• Remote denial of service could disrupt service availability
• User interaction needed for exploitation limits attack surface
• Patch verification and application are required for mitigation

Technical summary

A possible out of bounds write due to a missing bounds check was identified in ccci. This could lead to remote denial of service with no additional execution privileges needed. User interaction is needed for exploitation. Affected chipsets include MT6880, MT6890, MT6813, MT6986, MT6982, MT6980D, MT2735, and MT2737. The CVE record and Mediatek's security bulletin provide limited information about the vulnerability. Further verification is needed to determine the full scope of affected devices and potential impact. Defenders should prioritize verifying and applying patches from Mediatek, specifically for devices using these chipsets.

Defensive priority

Defenders should prioritize verifying and applying patches from Mediatek, specifically for devices using MT6880, MT6890, MT6813, MT6986, MT6982, MT6980D, MT2735, and MT2737 chipsets.

Recommended defensive actions

• Verify and apply patches from Mediatek for devices using affected chipsets
• Inventory devices using MT6880, MT6890, MT6813, MT6986, MT6982, MT6980D, MT2735, and MT2737 chipsets
• Monitor for user interaction that could be exploited
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and Mediatek's security bulletin provide limited information about the vulnerability. Further verification is needed to determine the full scope of affected devices and potential impact.

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.