What is CVE-2025-52089?

CVE-2025-52089 is a high-severity vulnerability in Totolink N300rb, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2025-07-11.

How severe is CVE-2025-52089?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Totolink N300rb

CVE-2025-52089

A hidden remote support feature protected by a static secret in TOTOLINK N300RB firmware version 8.54 allows an authenticated attacker to execute arbitrary OS commands with root privileges.

Vulnerability class: Broken Authentication

Published 2025-07-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.080 (94.6th percentile), scored 2026-09-29.

Low probability of exploitation in the next 30 days, but still tracked. 95th percentile — 94.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.078 · newest: 0.080 · change: +0.002

Affected products

Totolink N300rb
Totolink N300rb Firmware — versions 8.54

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

0x09.dev/posts/toto_decouvre_une_interface_de_debug/ (Exploit, Third Party Advisory)

Frequently asked questions

What is CVE-2025-52089?: CVE-2025-52089 is a high-severity vulnerability in Totolink N300rb, classified under Missing Authentication for Critical Function. CVSS score: 8.8/10. Published 2025-07-11.
How severe is CVE-2025-52089?: High severity. CVSS v3 base score is 8.8 out of 10.