Totolink N300RT 3.4.0-B20250430 libapmib.so /boafrm/formWsc is_cmd_string_valid localPin buffer overflow
Summary
A vulnerability was found in Totolink N300RT 3.4.0-B20250430 and classified as critical. This affects the function is_cmd_string_valid of the file /boafrm/formWsc of the component libapmib.so. Executing a manipulation of the argument localPin can lead to buffer overflow.
This vulnerability appears as CVE-2026-7218. The attack may be performed from remote. In addition, an exploit is available.
Details
A vulnerability was found in Totolink N300RT 3.4.0-B20250430. It has been declared as critical. This vulnerability affects the function is_cmd_string_valid of the file /boafrm/formWsc of the component libapmib.so. The manipulation of the argument localPin with an unknown input leads to a buffer overflow vulnerability. The CWE definition for the vulnerability is CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. As an impact it is known to affect confidentiality, integrity, and availability.
The advisory is available at github.com. This vulnerability was named CVE-2026-7218. The exploitation appears to be easy. The attack can be initiated remotely. Additional levels of successful authentication are necessary for exploitation. 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-2026-25974). If you want to get best quality of vulnerability data, you may have to visit VulDB.
Product
Vendor
Name
Version
License
Website
- Vendor: https://www.totolink.net/
CPE 2.3
CPE 2.2
CVSSv4
VulDB Vector: 🔒VulDB Reliability: 🔍
CVSSv3
VulDB Meta Base Score: 7.2VulDB Meta Temp Score: 6.5
VulDB Base Score: 7.2
VulDB Temp Score: 6.5
VulDB Vector: 🔒
VulDB Reliability: 🔍
CVSSv2
| AV | AC | Au | C | I | A |
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| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
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| Unlock | Unlock | Unlock | Unlock | Unlock | Unlock |
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍
Exploiting
Class: Buffer overflowCWE: CWE-120 / CWE-119
CAPEC: 🔒
ATT&CK: 🔒
Physical: No
Local: No
Remote: Yes
Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
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
04/27/2026 Advisory disclosed04/27/2026 VulDB entry created
04/28/2026 VulDB entry last update
Sources
Vendor: totolink.netAdvisory: github.com
Status: Not defined
CVE: CVE-2026-7218 (🔒)
GCVE (CVE): GCVE-0-2026-7218
GCVE (VulDB): GCVE-100-359818
EUVD: 🔒
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 04/27/2026 17:34Updated: 04/28/2026 07:08
Changes: 04/27/2026 17:34 (57), 04/28/2026 07:08 (1)
Complete: 🔍
Submitter: xyhackr
Cache ID: 216::103
Submit
Accepted
- Submit #802127: Totolink N300RT Router V3.4.0-B20250430 Buffer Overflow (by xyhackr)
If you want to get best quality of vulnerability data, you may have to visit VulDB.
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