CVE-2025-20778 MediaTek, Inc. CVE debrief

Who should care

Defenders of Mediatek-based systems, particularly those with System privilege escalation vulnerabilities, should assess exposure and prioritize patching based on system criticality and potential impact.

Why it matters

CVE-2025-20778 is a high-severity vulnerability in Mediatek's display component, potentially allowing local escalation of privilege. Defenders of Mediatek-based systems should assess exposure and prioritize patching based on system criticality and potential impact.

• Local escalation of privilege requires System privilege
• No user interaction needed for exploitation
• High-severity vulnerability with CVSS score of 7.8
• Potential impact on system security and integrity

Technical summary

The vulnerability is caused by a missing bounds check in the display component of Mediatek's products, potentially allowing local escalation of privilege if a malicious actor has already obtained the System privilege. The vulnerability has a CVSS score of 7.8 and requires no user interaction for exploitation. Affected Mediatek-based systems should be assessed for exposure, and owners should prioritize patching based on system criticality and potential impact. The technical details of the vulnerability indicate a high-severity vulnerability with a CVSS score of 7.8.

Defensive priority

Assess exposure of Mediatek-based systems, particularly those with System privilege escalation vulnerabilities. Verify if systems are using affected Mediatek components and prioritize patching based on system criticality and potential impact.

Recommended defensive actions

• Inventory Mediatek-based systems for potential exposure
• Verify if systems are using affected Mediatek components
• Prioritize patching based on system criticality and potential impact
• Monitor system logs for potential exploitation attempts
• 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

Evidence notes

The CVE record and NVD detail page provide information on the vulnerability, including its description, CVSS score, and affected products. A vendor advisory from Mediatek is also available. The vulnerability affects Mediatek's display component, and defenders should verify if systems are using affected Mediatek components. The source grounding and evidence limits indicate that the vulnerability has a high severity score and requires no user interaction for exploitation.

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.