CVE-2026-12495

CRITICAL CVSS 4.0: 5.3 EPSS 0.16%
Updated Jul 28, 2026
Denial-of-service
Parameter Value
CVSS 5.3 (CRITICAL)
Type CWE-121 (Stack-based Buffer Overflow)
Vendor Denial-of-service
Public PoC No

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.

Attack Parameters

Attack Vector
Adjacent
Requires local network access
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
None
No data leak
Integrity
None
No data modification
Availability
Low
Partial disruption

CVSS Vector v4.0