Buffer overflow in Mercusys Mb115-4g

CVE-2026-12495

Denial-of-service (DoS) vulnerability due to a stack buffer overflow in the http_gdpr_decrypt function of the Mercusys MB115-4G device's web interface. An unauthenticated attacker could exploit this vulnerability by sending a specially crafted request to the /cgi/login endpoint, causing memory corruption and the httpd process to crash, resulting in a denial of service for the web administration service.

Vulnerability class: Buffer Overflow

EPSS: 0.002 (6.1th percentile) — read the EPSS interpretation.