CVE-2026-1686 Details
Description
A security flaw has been discovered in Totolink A3600R 5.9c.4959. This issue affects the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. Performing a manipulation of the argument apcliSsid results in buffer overflow. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks.
A buffer overflow vulnerability has been identified in the TOTOLINK A3600R router, specifically in the firmware version 5.9c.4959. The issue arises within the 'setAppEasyWizardConfig' function of the '/lib/cste_modules/app.so' library. The vulnerability is caused by improper validation of the 'apcliSsid' parameter, which allows remote attackers to manipulate the input and trigger a buffer overflow. This exploitation could lead to arbitrary code execution or cause a denial-of-service condition by crashing the device.
Metrics
CVSS 4.0 Severity and Vector Strings:
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Jan 30, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3600R/4959-apcliSsid-setAppEasyWizardConfig.md | [email protected] | ExploitThird Party Advisory |
| https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3600R/4959-apcliSsid-setAppEasyWizardConfig.md#poc | [email protected] | Exploit |
| https://vuldb.com/?ctiid.343480 | [email protected] | Permissions RequiredVDB Entry |
| https://vuldb.com/?id.343480 | [email protected] | Third Party AdvisoryVDB Entry |
| https://vuldb.com/?submit.740888 | [email protected] | Third Party AdvisoryVDB Entry |
| https://www.totolink.net/ | [email protected] | Product |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-119 | Improper Restriction of Operations within the Bounds of a Memory Buffer | [email protected] |
| CWE-120 | Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| totolink a3600r firmware | 5.9c.4959 |
CPE
Remediation
| |
| totolink a3600r | All versions |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Feb 10, 2026 | Initial Analysis | [email protected] |
| Jan 30, 2026 | New CVE Received | [email protected] |