Unauthenticated service crash via unbounded sprintf
Published Oct 8, 2025 · Updated Oct 8, 2025
Stack-based buffer overflow in Tenda CH22 Firmware 1.0.0.0 and 1.0.0.1 allows remote attackers to crash its web service via an HTTP request. The formWrlsafeset function passes attacker-controlled mit_ssid_index data to sprintf, which writes into the fixed 448-byte stack buffer v27 without a length bound. No authentication is required; the published proof of concept demonstrates a service crash, while arbitrary code execution has not been demonstrated.
Summary
What happened
Stack-based buffer overflow in Tenda CH22 Firmware 1.0.0.0 and 1.0.0.1 allows remote attackers to crash its web service via an HTTP request. The formWrlsafeset function passes attacker-controlled mit_ssid_index data to sprintf, which writes into the fixed 448-byte stack buffer v27 without a length bound. No authentication is required; the published proof of concept demonstrates a service crash, while arbitrary code execution has not been demonstrated.
The record
- CVE
- CVE-2025-11418
- Published
- Oct 8, 2025
- Updated
- Oct 8, 2025
- Vendor
- Shenzhen Tenda Technology Co., Ltd.
- Product
- CH22 Firmware
- Classifications
- CWE-121, CWE-119, T1190
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 8, 2025CVE publishedPublication date reported by the CVE source.
- Oct 8, 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=1.0.0.0
- Affected versionversion=1.0.0.1
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
- Tenda CH22 AdvSetWrlsafeset crash 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