What is CVE-2025-29209?

CVE-2025-29209 is a critical-severity vulnerability in Totolink X18, classified under Command Injection. CVSS score: 9.8/10. Published 2025-04-18.

How severe is CVE-2025-29209?

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

RCE in Totolink X18

CVE-2025-29209

TOTOLINK X18 v9.1.0cu.2024_B20220329 has an unauthorized arbitrary command execution in the enable parameter' of the sub_41105C function of cstecgi .cgi.

Vulnerability class: Command Injection (OS Command Injection)

Published 2025-04-18 · 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: 0.012 (66.7th percentile), scored 2026-09-30.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.011 · newest: 0.012 · change: +0.001

Affected products

Totolink X18
Totolink X18 Firmware — versions 9.1.0cu.2024_b20220329

Weakness classification (CWE)

CWE-77 — Command Injection

References

github.com/LZY0522/CVE/blob/main/X18-sub_41105c.md (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-29209?: CVE-2025-29209 is a critical-severity vulnerability in Totolink X18, classified under Command Injection. CVSS score: 9.8/10. Published 2025-04-18.
How severe is CVE-2025-29209?: Critical severity. CVSS v3 base score is 9.8 out of 10.