Authenticated code execution via unchecked URL-filter copy
Published May 30, 2026 · Updated May 30, 2026
Stack-based buffer overflow in TRENDnet TEW-432BRP 3.10B20 allows remote authenticated users to execute arbitrary code via URL-filter input. The boa formSetUrlFilter handler copies attacker-controlled keyword_list or keyword data into a fixed-size stack variable without a length check, overwriting the return address. Access to the HTTP management interface with valid credentials is required; the demonstrated request crashes the router, while control of the return address enables code execution.
Summary
What happened
Stack-based buffer overflow in TRENDnet TEW-432BRP 3.10B20 allows remote authenticated users to execute arbitrary code via URL-filter input. The boa formSetUrlFilter handler copies attacker-controlled keyword_list or keyword data into a fixed-size stack variable without a length check, overwriting the return address. Access to the HTTP management interface with valid credentials is required; the demonstrated request crashes the router, while control of the return address enables code execution.
The record
- CVE
- CVE-2026-10121
- Published
- May 30, 2026
- Updated
- May 30, 2026
- Vendor
- TRENDnet
- Product
- TEW-432BRP
- Classifications
- CWE-119, CWE-121, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- May 30, 2026CVE publishedPublication date reported by the CVE source.
- May 30, 2026Record 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=3.10B20
What conditions does exploitation require?
What is affected?
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
- formSetUrlFilter oversized keyword_list 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