Vulnerability · Published Jun 21, 2025 · Assigned by VulDB

CVE-2025-6400TOTOLINK N300RH HTTP POST Message formPortFw buffer overflow

High 8.8

In plain English

A high-severity buffer overflow in N300RH from TOTOLINK. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 1.0% (higher than 62% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)1.0%top 37.5% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

A vulnerability was found in TOTOLINK N300RH 6.1c.1390_B20191101 and classified as critical. Affected by this issue is some unknown functionality of the file /boafrm/formPortFw of the component HTTP POST Message Handler. The manipulation of the argument service_type leads to buffer overflow. The attack may be launched remotely. The exploit has been disclosed to the public and may be used.

Affected products (as reported)

Vendor	Product	Versions
TOTOLINK	N300RH	6.1c.1390_B20191101

Weakness: CWE-120, CWE-119 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:P/RL:X/RC:R

References

VDB-313394 | TOTOLINK N300RH HTTP POST Message formPortFw buffer overflow vdb-entry, technical-description
VDB-313394 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
Submit #597687 | TOTOLINK N300RH_V4 V6.1c.1390_B20191101 Buffer Overflow third-party-advisory
https://github.com/d2pq/cve/blob/main/616/20.md related
https://github.com/d2pq/cve/blob/main/616/20.md#poc exploit
https://www.totolink.net/ product