CVE-2025-20794: mediatek, inc. mediatek chipset Stack-based Buffer Overflow

Vulnerability summary

CVE-2025-20794 is a medium (CVSS 6.5) Stack-based Buffer Overflow vulnerability in mediatek, inc. mediatek chipset. EPSS estimates a 0.28% chance of exploitation in the next 30 days, higher than 19.5% of scored vulnerabilities.

Timeline

1. 06-01-2026
   PublishedVulnerability first disclosed.
2. 30-03-2026
   Last modifiedVulnerability information updated.

Description

In Modem, there is a possible system crash due to improper input validation. 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: MOLY01689259 / MOLY01586470; Issue ID: MSV-4847.

• CWE-121Stack-based Buffer OverflowA stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function).