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.

CVSS 4.0

5.3CVSS:4.0/AV:A/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

EPSS

0.3% chance of exploitation in the next 30 days; higher than 16% of CVEs (scores of 2026-10-25)

CWE

CWE-121

Published

2026-07-27

Modified

2026-10-24

Record from

the NVD, synced 2026-10-24

References

• https://www.incibe.es/en/incibe-cert/notices/aviso/stack-based-buffer-overflow-mercusys-mb115-4g

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