CVE-2026-20449: mediatek, inc. mediatek chipset Classic Buffer Overflow

Vulnerability summary

CVE-2026-20449 is a medium (CVSS 6.5) Classic Buffer Overflow vulnerability in mediatek, inc. mediatek chipset. EPSS estimates a 0.22% chance of exploitation in the next 30 days, higher than 12.2% of scored vulnerabilities.

Timeline

1. 04-05-2026
   PublishedVulnerability first disclosed.
2. 04-05-2026
   Last modifiedVulnerability information updated.

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.

• CWE-120Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer.