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.

Project Subscriptions

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Advisories

No advisories yet.

Fixes

Solution

The vulnerability has been fixed by the Mercusys team in version V1_1.9.0.


Workaround

No workaround given by the vendor.

History

Mon, 27 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 27 Jul 2026 13:15:00 +0000

Type Values Removed Values Added
First Time appeared Mercusys
Mercusys mb115-4g
Vendors & Products Mercusys
Mercusys mb115-4g

Mon, 27 Jul 2026 11:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Stack-Based Buffer Overflow in the Mercusys MB115-4G
Weaknesses CWE-121
References
Metrics cvssV4_0

{'score': 9.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: INCIBE

Published:

Updated: 2026-07-27T14:40:50.557Z

Reserved: 2026-06-17T08:53:55.157Z

Link: CVE-2026-12495

cve-icon Vulnrichment

Updated: 2026-07-27T14:40:47.684Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-27T12:49:34Z

Weaknesses