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Vulnerability record · CVE-2026-6157 · published 13 April 2026

CVE-2026-6157: Memory buffer overflow vulnerability

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.

7.4 CVSS 4.0 High EPSS 0.79% · top 45.5% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow Deferred
7.4CVSS 4.0 base score, v2 9.0
0.79%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
5References
17 Jun 2026Last modified by NVD

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.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:

References

LinkTags
https://github.com/xyh4ck/iot_poc/blob/main/TOTOLINK/A800R/01_Buffer_Overflow_setAppEasyWizardConfig.md
https://vuldb.com/submit/793114
https://vuldb.com/vuln/357037
https://vuldb.com/vuln/357037/cti
https://www.totolink.net/

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Source: NIST National Vulnerability Database (record CVE-2026-6157), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.