Which versions of A7100Ru are affected by EUVD-2026-21322?

Totolink A7100RU routers running firmware 7.4cu.2313_b20191024 are vulnerable to unauthenticated remote command injection that permits complete system takeover without user interaction.

Is there a public PoC exploit available for EUVD-2026-21322?

Yes, a public proof-of-concept exploit is available for EUVD-2026-21322. Prioritise patching immediately. EPSS: 0.9%.

How to fix or mitigate EUVD-2026-21322?

Within 24 hours: Identify all Totolik A7100RU devices on network via inventory scan; isolate affected units to separate VLAN or restrict WAN access if replacement is unavailable. Within 7 days: Contact Totolink for available firmware updates beyond 7.4cu.2313_b20191024; evaluate firmware release dates and security advisories for patched versions. Within 30 days: Replace affected routers with patched firmware versions once available from vendor, or substitute with alternative vendor products with confirmed security patches; document all changes and validate network segmentation controls are in place for any interim devices.

A7100Ru EUVD-2026-21322

Q: What is the CVSS score of EUVD-2026-21322?

EUVD-2026-21322 has a CVSS 4.0 base score of 8.9 (High). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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. EPSS exploitation probability: 0.9%.

| CVE-2026-6028 HIGH

OS Command Injection (CWE-78)

2026-04-10 VulDB

Command Injection A7100Ru

8.9

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

8.9 HIGH

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/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

None

User Interaction

None

Scope

Lifecycle Timeline

Re-analysis Queued

Apr 27, 2026 - 19:07 vuln.today

cvss_changed

PoC Detected

Apr 10, 2026 - 07:16 vuln.today

Public exploit code

EUVD ID Assigned

Apr 10, 2026 - 07:00 euvd

EUVD-2026-21322

Analysis Generated

Apr 10, 2026 - 07:00 vuln.today

CVE Published

Apr 10, 2026 - 06:15 nvd

HIGH 8.9

DescriptionCVE.org

A security vulnerability has been detected in Totolink A7100RU 7.4cu.2313_b20191024. Impacted is the function setPptpServerCfg of the file /cgi-bin/cstecgi.cgi of the component CGI Handler. The manipulation of the argument enable leads to os command injection. The attack may be initiated remotely. The exploit has been disclosed publicly and may be used.

AnalysisAI

Remote unauthenticated OS command injection in Totolink A7100RU router firmware 7.4cu.2313_b20191024 enables complete system compromise. Attackers exploit the setPptpServerCfg function in /cgi-bin/cstecgi.cgi CGI handler by injecting malicious commands through the 'enable' parameter. …

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Attack ChainAIDerived

Hypothetical attack flow derived from CVE metadata

Access

Send crafted HTTP request to /cgi-bin/cstecgi.cgi

Exploit

Inject OS command in enable parameter

Execution

Execute arbitrary command on router

Impact

Achieve remote code execution