CVE-2026-49191 Exposed Hard-coded M3WebServer Backend API Key
Attackers can intercept hard-coded backend API keys from verbose error pages to bypass authentication and access sensitive data on the router.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-49191?
CVE-2026-49191 is a critical vulnerability in Acer Connect M6E 5G Portable WiFi Router, published on 4 Jun 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
The production build of the M3WebServer hard-codes its backend API keys, which can be easily intercepted through verbose error handling pages.
Weakness: CWE-287
Which versions are affected by CVE-2026-49191?
It affects 1 product.
Products include Acer Connect M6e 5g Firmware.
How do I fix CVE-2026-49191?
No fix has been published for CVE-2026-49191 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-49191 being exploited?
There is no known exploitation of CVE-2026-49191 in the wild and no public exploit code.
Other vulnerabilities in Acer Connect M6E 5G Portable WiFi Router
Sources
Also known as GHSA-gpg2-45rx-77ff.