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CVE-2026-31027

CRITICAL CVSS 3.1: 9.8 EPSS 0.78%
Updated Apr 07, 2026
Totolink
Parameter Value
CVSS 9.8 (CRITICAL)
Type CWE-120 (Buffer Copy without Checking Size)
Vendor Totolink
Public PoC No

TOTOlink A3600R v5.9c.4959 contains a buffer overflow vulnerability in the setAppEasyWizardConfig interface of /lib/cste_modules/app.so. The vulnerability occurs because the rootSsid parameter is not properly validated for length, allowing remote attackers to trigger a buffer overflow, potentially leading to arbitrary code execution or denial of service.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
None
No privileges needed
User Interaction
None
No user interaction needed

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 2

Configuration From (including) Up to (excluding)
Totolink A3600r_Firmware
cpe:2.3:o:totolink:a3600r_firmware:5.9c.4959:*:*:*:*:*:*:*
Totolink A3600r
cpe:2.3:h:totolink:a3600r:-:*:*:*:*:*:*:*