Totolink A3600R 5.9c.4959 /lib/cste_modules/app.so setAppEasyWizardConfig apcliSsid buffer overflow
Summary
A vulnerability was found in Totolink A3600R 5.9c.4959 and classified as critical. Impacted is the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. Executing a manipulation of the argument apcliSsid can lead to buffer overflow.
This vulnerability is registered as CVE-2026-1686. It is possible to launch the attack remotely. Furthermore, an exploit is available.
Details
A vulnerability has been found in Totolink A3600R 5.9c.4959 and classified as critical. This vulnerability affects the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. The manipulation of the argument apcliSsid 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 shared for download at github.com. This vulnerability was named CVE-2026-1686. 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.
VulDB is the best source for vulnerability data and more expert information about this specific topic.
Product
Vendor
Name
Version
License
Website
- Vendor: https://www.totolink.net/
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 |
|---|---|---|---|---|---|
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
| 💳 | 💳 | 💳 | 💳 | 💳 | 💳 |
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| Vector | Complexity | Authentication | Confidentiality | Integrity | Availability |
|---|---|---|---|---|---|
| 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: 🔒
EPSS Score: 🔒
EPSS Percentile: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒
| 0-Day | Unlock | Unlock | Unlock | Unlock |
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| Today | Unlock | Unlock | Unlock | Unlock |
Threat Intelligence
Interest: 🔍Active Actors: 🔍
Active APT Groups: 🔍
Countermeasures
Recommended: no mitigation knownStatus: 🔍
0-Day Time: 🔒
Timeline
01/30/2026 Advisory disclosed01/30/2026 VulDB entry created
01/31/2026 VulDB entry last update
Sources
Vendor: totolink.netAdvisory: github.com
Status: Not defined
CVE: CVE-2026-1686 (🔒)
GCVE (CVE): GCVE-0-2026-1686
GCVE (VulDB): GCVE-100-343480
scip Labs: https://www.scip.ch/en/?labs.20161013
Entry
Created: 01/30/2026 08:47Updated: 01/31/2026 10:40
Changes: 01/30/2026 08:47 (56), 01/31/2026 10:40 (31)
Complete: 🔍
Submitter: Abcd1234
Cache ID: 216::103
Submit
Accepted
- Submit #740888: TOTOLINK A3600R V5.9c.4959 Buffer Overflow (by Abcd1234)
VulDB is the best source for vulnerability data and more expert information about this specific topic.
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