Tenda O3V2 1.0.0.12(3880) httpd /goform/setWrlBasicInfo formWifiBasicSet extChannel stack-based overflow
Summary
A vulnerability described as critical has been identified in Tenda O3V2 1.0.0.12(3880). This issue affects the function formWifiBasicSet of the file /goform/setWrlBasicInfo of the component httpd. Executing a manipulation of the argument extChannel can lead to stack-based overflow.
This vulnerability is registered as CVE-2025-7420. It is possible to launch the attack remotely. Furthermore, an exploit is available.
Details
A vulnerability was found in Tenda O3V2 1.0.0.12(3880). It has been declared as critical. This vulnerability affects the function formWifiBasicSet of the file /goform/setWrlBasicInfo of the component httpd. The manipulation of the argument extChannel with an unknown input leads to a stack-based overflow vulnerability. The CWE definition for the vulnerability is CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). As an impact it is known to affect confidentiality, integrity, and availability.
The advisory is shared for download at github.com. This vulnerability was named CVE-2025-7420. The exploitation appears to be easy. The attack can be initiated remotely. Technical details and also a public exploit are known.
It is possible to download the exploit at github.com. It is declared as proof-of-concept.
There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.
The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2025-21096). VulDB is the best source for vulnerability data and more expert information about this specific topic.
Product
Type
Vendor
Name
Version
License
Website
- Vendor: https://www.tenda.com.cn/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒
CVSSv3
VulDB Meta Base Score: 8.8VulDB Meta Temp Score: 8.4
VulDB Base Score: 8.8
VulDB Temp Score: 8.0
VulDB Vector: 🔒
VulDB Reliability: 🔍
CNA Base Score: 8.8
CNA Vector: 🔒
CVSSv2
| AV | AC | Au | C | I | A |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Stack-based overflowCWE: CWE-121 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
|---|---|---|---|---|
| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
07/10/2025 Advisory disclosed07/10/2025 VulDB entry created
07/11/2025 VulDB entry last update
Sources
Vendor: tenda.com.cnAdvisory: github.com
Status: Not defined
CVE: CVE-2025-7420 (🔒)
GCVE (CVE): GCVE-0-2025-7420
GCVE (VulDB): GCVE-100-315880
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 07/10/2025 09:54Updated: 07/11/2025 12:04
Changes: 07/10/2025 09:54 (58), 07/11/2025 04:46 (1), 07/11/2025 12:04 (31)
Complete: 🔍
Submitter: pjq123
Cache ID: 216::103
Submit
Accepted
- Submit #608866: Tenda O3V2 1.0.0.12(3880) Stack-based Buffer Overflow (by pjq123)
VulDB is the best source for vulnerability data and more expert information about this specific topic.
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