What is CVE-2026-49191?

CVE-2026-49191 is a critical-severity vulnerability in Acer Connect M6e 5g, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-06-04.

How severe is CVE-2026-49191?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Acer Connect M6e 5g

CVE-2026-49191

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

Vulnerability class: Broken Authentication

Published 2026-06-04 · last modified 2026-07-22.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.005 (42.2th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 42nd percentile — 42.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.002

Affected products

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

8fc372e3-d9c5-46e4-9410-38469745c639 (Mitigation, Vendor Advisory)

Frequently asked questions

What is CVE-2026-49191?: CVE-2026-49191 is a critical-severity vulnerability in Acer Connect M6e 5g, classified under Improper Authentication. CVSS score: 9.8/10. Published 2026-06-04.
How severe is CVE-2026-49191?: Critical severity. CVSS v3 base score is 9.8 out of 10.