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How the CVE Works
CVE-2025-45859 exploits a buffer overflow in TOTOLINK A3002R firmware version v4.0.0-B20230531.1404. The vulnerability occurs in the `formMapDelDevice` interface due to improper validation of the `bandstr` parameter. An attacker can craft a malicious request with an oversized `bandstr` value, overflowing the buffer and potentially executing arbitrary code with root privileges. The lack of bounds checking allows overwriting adjacent memory, leading to remote code execution (RCE) or a denial-of-service (DoS) condition.
DailyCVE Form
Platform: TOTOLINK A3002R
Version: v4.0.0-B20230531.1404
Vulnerability: Buffer Overflow
Severity: Critical
Date: 06/16/2025
Prediction: Patch expected by 07/20/2025
What Undercode Say
Analytics:
curl -X POST -d "bandstr=$(python -c 'print("A"500)')" http://<target>/formMapDelDevice
payload = "A" 500
requests.post("http://<target>/formMapDelDevice", data={"bandstr": payload})
Exploit:
- Craft oversized `bandstr` payload.
- Send POST request to
/formMapDelDevice. - Trigger RCE/DoS via memory corruption.
Protection from this CVE:
- Update firmware post-patch.
- Validate input length.
- Enable stack canaries.
Impact:
- Remote code execution.
- System compromise.
- Service disruption.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
