Buffer Overflow in TOTOLINK T10 by TOTOLINK
CVE-2025-5901

8.7HIGH

Key Information:

Vendor

Totolink
Status
T10
Vendor
CVE Published:
9 June 2025

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2025-5901?

A significant vulnerability has been identified in the TOTOLINK T10, specifically in the UploadCustomModule function within the POST Request Handler. This vulnerability arises from improper handling of the File argument in the cgi-bin/cstecgi.cgi file, leading to a buffer overflow. Attackers can exploit this flaw remotely, potentially allowing unauthorized access and manipulation of the affected system. The exploit has been publicly disclosed, raising serious concerns about the security of installations running the affected firmware version.

Affected Version(s)

T10 4.1.8cu.5207

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-2025-5901 - Proof of Concept

References

https://vuldb.com/?id.311674
vdb-entrytechnical-description
https://vuldb.com/?ctiid.311674
signaturepermissions-required
https://vuldb.com/?submit.592243
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

Yangshuangning (VulDB User)
.
CVE-2025-5901 : Buffer Overflow in TOTOLINK T10 by TOTOLINK