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Vulnerability record · CVE-2026-1686 · published 30 January 2026

CVE-2026-1686: Totolink a3600r firmware memory buffer overflow vulnerability

TTotolink · A3600r Firmware

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.

7.4 CVSS 4.0 High EPSS 0.70% · top 48.9% CWE-119 · Memory buffer overflowCWE-120 · Classic buffer overflow
7.4CVSS 4.0 base score, v2 9.0
0.70%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
6References, 2 tagged exploit
17 Jun 2026Last modified by NVD

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.

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:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3600R/4959-apcliSsid-setAppEasyWizardConf ExploitThird Party Advisory
https://github.com/SunnyYANGyaya/cuicuishark-sheep-fishIOT/blob/main/ToTolink/A3600R/4959-apcliSsid-setAppEasyWizardConf Exploit
https://vuldb.com/?ctiid.343480 Permissions RequiredVDB Entry
https://vuldb.com/?id.343480 Third Party AdvisoryVDB Entry
https://vuldb.com/?submit.740888 Third Party AdvisoryVDB Entry
https://www.totolink.net/ Product

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2026-31027Totolink a3600r firmware classic buffer overflow vulnerabilityTOTOlink A3600R v5.9c.4959 contains a buffer overflow vulnerability in the setAppEasyWizardConfig interface of /lib/cste_modules/app.so. The vulnerab…EPSS 1.6%9.8CVE-2022-34993Totolink a3600r firmware hard-coded credentials vulnerabilityTotolink A3600R_Firmware V4.1.2cu.5182_B20201102 contains a hard code password for root in /etc/shadow.sample.EPSS 1.0%9.8CVE-2022-25078Totolink a3600r firmware os command injection vulnerabilityTOTOLink A3600R V4.1.2cu.5182_B20201102 was discovered to contain a command injection vulnerability in the "Main" function. This vulnerability allows…EPSS 3.2%8.7CVE-2024-7187Totolink a3600r firmware classic buffer overflow vulnerabilityA vulnerability was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. It has been declared as critical. This vulnerability affects the function Upload…EPSS 1.2%8.7CVE-2024-7186Totolink a3600r firmware classic buffer overflow vulnerabilityA vulnerability was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. It has been classified as critical. This affects the function setWiFiAclAddConfi…EPSS 1.1%8.7CVE-2024-7185Totolink a3600r firmware classic buffer overflow vulnerabilityA vulnerability was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102 and classified as critical. Affected by this issue is the function setWebWlanIdx …EPSS 1.1%8.7CVE-2024-7184Totolink a3600r firmware classic buffer overflow vulnerabilityA vulnerability has been found in TOTOLINK A3600R 4.1.2cu.5182_B20201102 and classified as critical. Affected by this vulnerability is the function s…EPSS 1.1%8.7CVE-2024-7183Totolink a3600r firmware classic buffer overflow vulnerabilityA vulnerability, which was classified as critical, was found in TOTOLINK A3600R 4.1.2cu.5182_B20201102. Affected is the function setUploadSetting of …EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2026-1686), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.