Buffer Overflow Vulnerability in TOTOLINK N300RH HTTP POST Message Handler
CVE-2025-6400

8.7HIGH

Key Information:

Vendor

Totolink
Status
N300rh
Vendor
CVE Published:
21 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-6400?

A significant vulnerability has been identified in the TOTOLINK N300RH router, specifically within the HTTP POST Message Handler component, located in the file /boafrm/formPortFw. This vulnerability arises from improper handling of the 'service_type' argument, which can lead to a buffer overflow. Attackers may exploit this flaw remotely, potentially undermining the device's security. The issue has been publicly disclosed, raising concerns about its impact on users and demanding immediate attention to safeguard against potential intrusions.

Affected Version(s)

N300RH 6.1c.1390_B20191101

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2025-6400 - Proof of Concept

References

https://vuldb.com/?id.313394
vdb-entrytechnical-description
https://vuldb.com/?ctiid.313394
signaturepermissions-required
https://vuldb.com/?submit.597687
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

yuhongxiang (VulDB User)
.
CVE-2025-6400 : Buffer Overflow Vulnerability in TOTOLINK N300RH HTTP POST Message Handler