Buffer Overflow Vulnerability in TOTOLINK A3300R Router
CVE-2025-12258

8.7HIGH

Key Information:

Vendor

Totolink
Status
A3300r
Vendor
CVE Published:
27 October 2025

What is CVE-2025-12258?

A vulnerability was identified in the TOTOLINK A3300R router, specifically within the function setOpModeCfg located in the /cgi-bin/cstecgi.cg file. This flaw allows for a stack-based buffer overflow due to improper handling of the opmode parameter. An attacker can exploit this vulnerability remotely, potentially leading to unauthorized access or control over the affected device.

Affected Version(s)

A3300R 17.0.0cu.557_B20221024

References

https://vuldb.com/?id.329929
vdb-entrytechnical-description
https://vuldb.com/?ctiid.329929
signaturepermissions-required
https://vuldb.com/?submit.673725
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

  • Vulnerability published

  • Vulnerability Reserved

Credit

wxhwxhwxh_ (VulDB User)
JSON
.
CVE-2025-12258 : Buffer Overflow Vulnerability in TOTOLINK A3300R Router