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CVE-2026-12495

Stack-Based Buffer Overflow in the Mercusys MB115-4G

MEDIUM
5.3
CVSS Score
Published: July 27, 2026 at 10:32 AM UTC
Updated: October 24, 2026 at 01:10 PM UTC
1 product affected across 1 vendorMB115-4G

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

MB115-4G· Mercusys
90%
1.7.0 ≤ v ≤ 1.9.01.7.0

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

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

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUMINCIBE
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-121

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