How to fix EUVD-2026-21893?

Within 24 hours: Inventory all TOTOLIK A7000R devices in your environment and document firmware versions. Within 7 days: Restrict network access to router administration interfaces to trusted personnel only; implement network segmentation to limit authenticated attacker scope. Within 30 days: Contact TOTOLIK for patch availability timeline; evaluate replacement with alternative router models if vendor does not provide patched firmware; implement enhanced network monitoring on affected devices for anomalous administrative access patterns.

Is Stack Overflow affected by EUVD-2026-21893?

CVE-2026-6168 is a stack-based buffer overflow affecting TOTOLIK A7000R routers running firmware version 9.1.0u.6115 and earlier that allows authenticated network users to gain complete control of the device.

EUVD-2026-21893

| CVE-2026-6168 HIGH

2026-04-13 VulDB

7.4

CVSS 4.0

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:X/V:X/RE:X/U:X

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Analysis Generated

Apr 13, 2026 - 07:29 vuln.today

CVSS Changed

Apr 13, 2026 - 07:22 NVD

8.8 (HIGH) 7.4 (HIGH)

Description

A flaw has been found in TOTOLINK A7000R up to 9.1.0u.6115. The affected element is the function setWiFiEasyGuestCfg of the file /cgi-bin/cstecgi.cgi. This manipulation of the argument ssid5g causes stack-based buffer overflow. Remote exploitation of the attack is possible. The exploit has been published and may be used.

Analysis

Stack-based buffer overflow in TOTOLINK A7000R router (firmware ≤9.1.0u.6115) allows authenticated remote attackers to achieve complete system compromise via the setWiFiEasyGuestCfg CGI function. The vulnerability exists in /cgi-bin/cstecgi.cgi where unsanitized input to the ssid5g parameter triggers memory corruption, enabling arbitrary code execution with device privileges. …

Remediation

Within 24 hours: Inventory all TOTOLIK A7000R devices in your environment and document firmware versions. Within 7 days: Restrict network access to router administration interfaces to trusted personnel only; implement network segmentation to limit authenticated attacker scope. …

Analysis

Detailed AI-generated intelligence summary covering attack vector, impact assessment, affected versions, remediation steps, and indicators of compromise.

POChttps://••••••••••.com/exploit

PATCHhttps://••••••••••.com/patch

ADVISORYhttps://••••••••••.com/advisory

Full analysis requires sign-in

Get intelligence summaries, risk assessment, exploit details, threat intel, and remediation guidance.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.1

CVSS: +37

POC: +20

EUVD-2026-21893 vulnerability details – vuln.today

Back

EUVD-2026-21893

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Remediation

Analysis

Full analysis requires sign-in

Priority Score

Share

EUVD-2026-21893

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Remediation

Full analysis requires sign-in

Priority Score

Share

External POC / Exploit Code