CVE-2026-80148 Lantronix Autonomous Out-of-Band Devices WebSSH SSRF via Username Truncation
Unauthenticated attackers can exploit a username truncation flaw in WebSSH to force the device to connect to arbitrary internal hosts, enabling network enumeration.
- 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-2026-80148?
CVE-2026-80148 is a high-severity server-side request forgery vulnerability in LANTRONIX EMG7500, published on 22 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Lantronix SLC8000 before firmware v9.7.0.3, SLC9000 before firmware v9.7.0.2, EMG8500/EMG7500 before firmware v9.7.0.1, and all firmware versions of SLB882 contain a server-side request forgery vulnerability in the WebSSH/WebTelnet listener that allows unauthenticated attackers to cause the affected device to establish SSH connections to attacker-controlled endpoints. The custom shellinaboxd builds its SSH connection target using a snprintf call with user-supplied input; by supplying an overlong username string an attacker causes the device IP suffix to be truncated, redirecting the resulting connection to an arbitrary host. Attackers can use this capability to enumerate or communicate with internal network endpoints that would otherwise be inaccessible.
Weakness: CWE-918
Which versions are affected by CVE-2026-80148?
How do I fix CVE-2026-80148?
No fix has been published for CVE-2026-80148 yet. Limit exposure of the affected software until one is available.
Upgrade, and send outbound requests through an allow-list that blocks internal addresses. More about Server-side request forgery.
Is CVE-2026-80148 being exploited?
There is no known exploitation of CVE-2026-80148 in the wild and no public exploit code.
Sources
Also known as GHSA-6rw9-fmc4-f3gq.