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CVE-2026-12495

CRITICAL
9.2
CVSS 4.0
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.

Metadata

CVE ID
CVE-2026-12495
State
PUBLISHED
Assigner
INCIBE
Reserved
2026-06-17 08:53 UTC
Published
2026-07-27 10:32 UTC
Last updated
2026-07-27 14:40 UTC
Primary CWE
CWE-121
CWE-121 Stack-based buffer overflow
Vendor / Product
Mercusys / MB115-4G
Sources
cve.org  ·  NVD

Severity & Metrics

9.2 CRITICAL CVSS 4.0
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
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
total
Affected products (1)
VendorProductPlatformVersions
Mercusys MB115-4G — 1.7.0 ≤ 1.9.0
Weakness (CWE)
CWESourceDescription
CWE-121 cna CWE-121 Stack-based buffer overflow
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.2 CRITICAL 4.0 cna 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
References (1)
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