Authenticated code execution via unchecked stack copy
Published Jun 22, 2025 · Updated Jun 23, 2025
Stack-based buffer overflow in TOTOLINK A3002R 1.1.1-B20200824.0128 allows remote authenticated users to execute code via submit-url. The boa formWlanMultipleAP handler copies the attacker-controlled submit-url value into a stack-local buffer without a length check, overwriting the function return address. Low-privileged access to the web management endpoint is required; the published proof of concept crashes the router, while return-address control enables arbitrary code execution.
Summary
What happened
Stack-based buffer overflow in TOTOLINK A3002R 1.1.1-B20200824.0128 allows remote authenticated users to execute code via submit-url. The boa formWlanMultipleAP handler copies the attacker-controlled submit-url value into a stack-local buffer without a length check, overwriting the function return address. Low-privileged access to the web management endpoint is required; the published proof of concept crashes the router, while return-address control enables arbitrary code execution.
The record
- CVE
- CVE-2025-6486
- Published
- Jun 22, 2025
- Updated
- Jun 23, 2025
- Vendor
- TOTOLINK
- Product
- A3002R
- Classifications
- CWE-119, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Jun 22, 2025CVE publishedPublication date reported by the CVE source.
- Jun 23, 2025Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
Compare your product and version with the public record. A matching version still requires validation against your environment.
Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.1.1-B20200824.0128
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
- A3002R formWlanMultipleAP submit-url proof of conceptproof of concept · demonstrated
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
See the directory against your own environment.
Your stack
Check the software in your environment
Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.
Book a demo