Buffer Overflow Vulnerability in Totolink EX1800T Router
CVE-2025-1852

8.7HIGH

Key Information:

Vendor
Totolink
Status
Ex1800t
Vendor
CVE Published:
3 March 2025

Badges

👾 Exploit Exists🟡 Public PoC

Summary

A buffer overflow vulnerability exists in the login authentication function of Totolink EX1800T routers, specifically in the /cgi-bin/cstecgi.cgi file. This flaw can be exploited by manipulating the password argument, potentially allowing remote attackers to execute arbitrary code or cause the device to become unresponsive. Given that the exploit can be initiated remotely, it poses a significant risk to network security, especially in environments where the router is exposed to the internet.

Affected Version(s)

EX1800T 9.1.0cu.2112_B20220316

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-2025-1852 - Proof of Concept

References

https://vuldb.com/?id.298120
vdb-entrytechnical-description
https://vuldb.com/?ctiid.298120
signaturepermissions-required
https://vuldb.com/?submit.505362
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

watermelon-happy (VulDB User)
.