Is there a public PoC exploit available for EUVD-2026-19464?

Yes, a public proof-of-concept exploit is available for EUVD-2026-19464. Prioritise patching immediately. EPSS: 0.9%.

A3300R EUVD-2026-19464

Q: What is the CVSS score of EUVD-2026-19464?

EUVD-2026-19464 has a CVSS 4.0 base score of 2.0 (Low). CVSS vector: CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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-2026-5679 LOW

OS Command Injection (CWE-78)

2026-04-06 VulDB

GHSA-cmq3-f6cg-p3p7

Command Injection A3300R

2.0

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.0 LOW

CVSS:4.0/AV:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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:A/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/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

Adjacent

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

5.1 (MEDIUM) 2.0 (LOW)

PoC Detected

Apr 07, 2026 - 13:20 vuln.today

Public exploit code

EUVD ID Assigned

Apr 06, 2026 - 19:30 euvd

EUVD-2026-19464

Analysis Generated

Apr 06, 2026 - 19:30 vuln.today

CVE Published

Apr 06, 2026 - 19:00 nvd

MEDIUM 5.1

DescriptionCVE.org

A security vulnerability has been detected in Totolink A3300R 17.0.0cu.557_B20221024. The impacted element is the function vsetTr069Cfg of the file /cgi-bin/cstecgi.cgi. The manipulation of the argument stun_pass leads to os command injection. The exploit has been disclosed publicly and may be used.

AnalysisAI

OS command injection in Totolink A3300R firmware version 17.0.0cu.557_B20221024 allows authenticated local attackers to execute arbitrary commands via the stun_pass parameter in the vsetTr069Cfg function of /cgi-bin/cstecgi.cgi. The vulnerability has a CVSS score of 5.1 (medium severity) with CVSS:4.0/AV:A/AC:L/PR:L vector indicating adjacent network access and low authentication requirements. Publicly available exploit code exists, though active exploitation status (CISA KEV) is not confirmed.

Technical ContextAI

This vulnerability exploits improper input validation in the vsetTr069Cfg CGI function, a component of Totolink A3300R router firmware. The stun_pass parameter is passed unsanitized to an OS command execution context, enabling CWE-78 OS command injection. The Totolink A3300R is a residential wireless router (CPE: cpe:2.3:a:totolink:a3300r:*:*:*:*:*:*:*:*) commonly deployed in enterprise and home networks. The /cgi-bin/cstecgi.cgi endpoint handles TR-069 (CPE WAN Management Protocol) configuration, making this function a direct interface to device management. Attackers with low-privilege access (authenticated users on the adjacent network) can inject shell metacharacters into the stun_pass field to break out of the intended command context and execute arbitrary code with the privileges of the CGI process.

RemediationAI

Check Totolink's official website (https://www.totolink.net/) for the latest firmware release for the A3300R model and upgrade immediately if a patched version is available. If no official patch has been released, restrict network access to the router's management interface by disabling remote management, limiting administrative access to trusted hosts only, and segmenting the router's management VLAN from untrusted network segments. Apply strong authentication credentials (long, complex passwords) to any user accounts with access to the router's web interface. Monitor Totolink security advisories and VulDB (https://vuldb.com/vuln/355506) for patch availability confirmation.