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Vulnerability record · CVE-2026-20449 · published 4 May 2026

CVE-2026-20449: Mediatek mt6763 firmware classic buffer overflow vulnerability

Mediatek · Mt6763 Firmware

In Modem, there is a possible system crash due to a heap buffer overflow. 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: MOLY01760138; Issue ID: MSV-6148.

6.5 CVSS 3.1 Medium EPSS 0.22% · top 88.3% CWE-120 · Classic buffer overflow
6.5CVSS 3.1 base score
0.22%EPSS exploitation probability, 30 days
NoNot in CISA KEV
68Affected product versions listed by NVD
1References
17 Jun 2026Last modified by NVD

Description

In Modem, there is a possible system crash due to a heap buffer overflow. 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: MOLY01760138; Issue ID: MSV-6148.

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

68 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://corp.mediatek.com/product-security-bulletin/May-2026 Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-20449), CISA KEV, FIRST EPSS (scores of 2026-09-28). This page is refreshed as NVD updates the record.