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The CVE-2025-46060 vulnerability in TOTOLINK N600R routers involves a buffer overflow in the UPLOAD_FILENAME component. When processing file upload requests, the device fails to properly validate the length of the filename parameter, allowing an attacker to overwrite adjacent memory locations. This occurs due to improper bounds checking in the firmware’s file handling routine. By crafting a malicious HTTP request with an excessively long filename (typically > 512 bytes), an attacker can corrupt memory structures and ultimately achieve remote code execution with root privileges. The vulnerability is network-exploitable without authentication.
DailyCVE Form
Platform: TOTOLINK N600R
Version: v4.3.0cu.7866_B2022506
Vulnerability: Buffer Overflow
Severity: Critical
Date: 06/16/2025
Prediction: Patch by 07/15/2025
What Undercode Say
$ python3 exploit.py -t 192.168.1.1 -p 80 -f malicious.bin $ nmap -sV --script vulners <target> $ checksec --file=/usr/bin/httpd
How Exploit
Craft HTTP POST with oversized filename
Overwrite EIP register
ROP chain execution
Deploy payload
Protection from this CVE
Disable remote admin
Apply firmware updates
Network segmentation
Impact
Full device compromise
Network pivot point
Permanent DoS possible
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
