Authenticated code execution via unchecked sprintf
Published Feb 25, 2026 · Updated Feb 25, 2026
Stack buffer overflow in Tenda F453 1.0.0.3 httpd allows remote authenticated users to execute code via a crafted page parameter. fromSafeEmailFilter passes the page-derived v6 value to sprintf without a length check, overflowing the stack buffer s. Low-privilege access to the web-management endpoint is required; successful exploitation interrupts the HTTP service or executes attacker-controlled code.
Summary
What happened
Stack buffer overflow in Tenda F453 1.0.0.3 httpd allows remote authenticated users to execute code via a crafted page parameter. fromSafeEmailFilter passes the page-derived v6 value to sprintf without a length check, overflowing the stack buffer s. Low-privilege access to the web-management endpoint is required; successful exploitation interrupts the HTTP service or executes attacker-controlled code.
The record
- CVE
- CVE-2026-3169
- Published
- Feb 25, 2026
- Updated
- Feb 25, 2026
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- F453
- Classifications
- CWE-120, CWE-119, T1190
- Attack vector
- network
- Privileges
- authenticated
Timeline
How it unfolded
- Feb 25, 2026CVE publishedPublication date reported by the CVE source.
- Feb 25, 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=1.0.0.3
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
- F453 SafeEmailFilter page-parameter PoCproof 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