CVE-2026-6157 Details
Description
A vulnerability was detected in Totolink A800R 4.1.2cu.5137_B20200730. This impacts the function setAppEasyWizardConfig in the library /lib/cste_modules/app.so. The manipulation of the argument apcliSsid results in buffer overflow. The attack can be executed remotely. The exploit is now public and may be used.
A buffer overflow vulnerability has been identified in the Totolink A800R router running firmware version 4.1.2cu.5137_B20200730. The issue arises in the 'setAppEasyWizardConfig' function within the '/lib/cste_modules/app.so' library. The vulnerability is caused by improper validation of the 'apcliSsid' parameter, which allows remote attackers to exploit the buffer overflow. This exploitation could lead to arbitrary code execution or a denial-of-service condition.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Apr 13, 2026CISA-ADP
Assessed Apr 13, 2026References to Advisories, Solutions, and Tools
By selecting these links, you will be leaving this site. These are references gathered from the official CVE record and are not endorsed by Volerion.
| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A800R/01_Buffer_Overflow_setAppEasyWizardConfig.md | [email protected] | ExploitTechnical Description |
| https://vuldb.com/submit/793114 | [email protected] | Technical Description |
| https://vuldb.com/vuln/357037 | [email protected] | AdvisoryExploitPartial Content |
| https://vuldb.com/vuln/357037/cti | [email protected] | Content Wall |
| https://www.totolink.net/ | [email protected] | Vendor |
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 A800R | 4.1.2cu.5137_B20200730 |
CPE
Remediation
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Change History
3 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Jun 17, 2026 | CVE Modified | CISA-ADP |
| Apr 13, 2026 | New CVE Received | [email protected] |