What is CVE-2026-26791?

CVE-2026-26791 is a critical-severity vulnerability in Gl-Inet Ar300m16, classified under Command Injection. CVSS score: 9.8/10. Published 2026-03-12.

How severe is CVE-2026-26791?

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

RCE in Gl-Inet Ar300m16

CVE-2026-26791

GL-iNet GL-AR300M16 v4.3.11 was discovered to contain a command injection vulnerability via the string port parameter in the enable_echo_server function. This vulnerability allows attackers to execute arbitrary commands via a crafted input.

Vulnerability class: Command Injection (OS Command Injection)

Published 2026-03-12 · last modified 2026-06-17.

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: 0.037 (89.6th percentile), scored 2026-10-19.

Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 89.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.025 · newest: 0.037 · change: +0.012

Affected products

Gl-Inet Ar300m16
Gl-Inet Ar300m16 Firmware — versions 4.3.11

Weakness classification (CWE)

CWE-77 — Command Injection

References

github.com/sezangel/IOT-vul/tree/main/GL-iNet/GL-AR300M16/enable_echo_server (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2026-26791?: CVE-2026-26791 is a critical-severity vulnerability in Gl-Inet Ar300m16, classified under Command Injection. CVSS score: 9.8/10. Published 2026-03-12.
How severe is CVE-2026-26791?: Critical severity. CVSS v3 base score is 9.8 out of 10.