A hidden remote support feature protected by a static secret in TOTOLINK N300RB firmware version 8.54 allows an authenticated attacker to e…

published 2025-07-11 15 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-21164

cvss: 8.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 9.7%; EPSS 9.7% chance of exploitation in 30 days, percentile 95%
public exploits: 1; Exploit-DB

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.

Timeline

2025-07-11 Published
2025-07-16 First public exploit (EDB-52363)

CISA SSVC

Exploitation: none
Automatable: no
Technical impact: total
Assessed: 15 mo ago (2025-07-11)

Exploit prediction

9.69% chance of exploitation in the next 30 days, higher than 95% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

EDB-52363 TOTOLINK N300RB 8.54 - Command Execution hardware, 2025-07-16
0x09.dev https://0x09.dev/posts/toto_decouvre_une_interface_de_debug/ referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	8.8	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

CWE-306 Missing Authentication for Critical Functionality

References

0x09.dev /posts/toto_decouvre_une_interface_de_debug/
exploit, third-party-advisory

Sources

CVE List CVE-2025-52089
NVD CVE-2025-52089

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary