The Alcatel Lucent I-240W-Q GPON ONT using firmware version 3FE54567BOZJ19 allows a remote, unauthenticated attacker to enable telnetd on the router via a crafted HTTP request.
https://www.tenable.com/blog/tenable-research-discovers-remote-code-execution-vulnerabilities-in-gpon-routers
https://www.tenable.com/security/research/tra-2019-09
Source: Mitre, NVD
Published: 2019-03-05
Updated: 2020-10-19
Base Score: 5
Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N
Severity: Medium
Base Score: 7.5
Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
Severity: High