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How the CVE Works
CVE-2025-6147 is a critical buffer overflow vulnerability in TOTOLINK A702R firmware version 4.0.0-B20230721.1521. The flaw resides in the `/boafrm/formSysLog` endpoint, which handles HTTP POST requests. By manipulating the `submit-url` argument, an attacker can trigger a buffer overflow due to insufficient input validation. This allows remote code execution (RCE) with elevated privileges. The exploit is publicly available, increasing the risk of widespread attacks.
DailyCVE Form
Platform: TOTOLINK A702R
Version: 4.0.0-B20230721.1521
Vulnerability: Buffer Overflow
Severity: Critical
Date: 06/23/2025
Prediction: Patch expected by 07/15/2025
What Undercode Say
curl -X POST -d "submit-url=<malicious_payload>" http://<target_ip>/boafrm/formSysLog
payload = "A" 1024 Overflow trigger
requests.post(f"http://{target}/boafrm/formSysLog", data={"submit-url": payload})
How Exploit
- Craft a malicious HTTP POST request with an oversized `submit-url` value.
- Exploit leads to arbitrary code execution on the device.
- No authentication required for exploitation.
Protection from this CVE
- Apply vendor firmware updates immediately.
- Disable remote management if unused.
- Implement network segmentation.
Impact
- Full device compromise.
- Unauthorized access to network.
- Potential botnet recruitment.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
