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How the CVE Works:
CVE-2025-8136 is a critical buffer overflow vulnerability in TOTOLINK A702R firmware version 4.0.0-B20230721.1521. The flaw resides in the `/boafrm/formFilter` endpoint, which processes HTTP POST requests. The `ip6addr` parameter is improperly validated, allowing an attacker to overflow the buffer by supplying excessively long input. Remote exploitation is possible, potentially leading to arbitrary code execution or device compromise. Publicly disclosed PoC exploits increase the risk of active attacks.
DailyCVE Form:
Platform: TOTOLINK A702R
Version: 4.0.0-B20230721.1521
Vulnerability: Buffer Overflow
Severity: Critical
Date: 07/25/2025
Prediction: Patch by 08/15/2025
What Undercode Say:
Analytics:
curl -X POST -d "ip6addr=$(python -c 'print(\"A\"1000)')" http://<target>/boafrm/formFilter
Exploit:
payload = "A" 1000
requests.post("http://<target>/boafrm/formFilter", data={"ip6addr": payload})
Protection from this CVE:
- Apply vendor patch (when released).
- Disable remote admin access.
- Use network segmentation.
Impact:
- Remote code execution.
- Device takeover.
- Unauthorized access.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
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