CVE-2026-49191 CRITICAL

CVE-2026-49191: Exposed Hard-coded M3WebServer Backend API Key

Vendor Acer
Product Connect M6E 5G Portable WiFi Router
Weakness CWE-287 · Improper authentication
Published June 4, 2026
Last update June 4, 2026
View on NVD All CVEs

CVSS base score

9.3/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

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

What the vulnerability does

01Description

The production build of the M3WebServer hard-codes its backend API keys, which can be easily intercepted through verbose error handling pages.

Key dates

02Disclosure timeline

June 4, 2026 CVE published
June 4, 2026 Record updated