Which versions of Comfast CF-AC100 are affected by CVE-2026-4467?

Organizations using A vulnerability should be aware of moderate risk from CVE-2026-4467, a injection vulnerability rated CVSS 4.7.

How to fix or mitigate CVE-2026-4467?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

Comfast CF-AC100 CVE-2026-4467

Q: What is the CVSS score of CVE-2026-4467?

CVE-2026-4467 has a CVSS 4.0 base score of 2.0 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/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: 0.2%.

EUVD-2026-13515 LOW

Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection') (CWE-74)

2026-03-20 cna@vuldb.com

Command Injection

2.0

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.0 LOW

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

Network

Attack Complexity

Low

Privileges Required

High

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)

CVSS changed

Apr 22, 2026 - 21:37 NVD

4.7 (MEDIUM) 5.1 (MEDIUM)

EUVD ID Assigned

Mar 20, 2026 - 08:37 euvd

EUVD-2026-13515

Analysis Generated

Mar 20, 2026 - 08:37 vuln.today

CVE Published

Mar 20, 2026 - 03:16 nvd

MEDIUM 4.7

DescriptionCVE.org

A vulnerability was found in Comfast CF-AC100 2.6.0.8. This impacts an unknown function of the file /cgi-bin/mbox-config?method=SET&section=wireless_device_dissoc. The manipulation results in command injection. The attack can be executed remotely. The exploit has been made public and could be used. The vendor was contacted early about this disclosure but did not respond in any way.

AnalysisAI

Command injection in Comfast CF-AC100 2.6.0.8 wireless configuration endpoint allows unauthenticated remote attackers to execute arbitrary commands with elevated privileges through the /cgi-bin/mbox-config interface. Public exploit code exists for this vulnerability, and the vendor has not released a patch despite early notification. The attack requires network access but no user interaction, making it readily exploitable in exposed deployments.

Technical ContextAI

The vulnerability is classified as CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), which describes insufficient input sanitization allowing command injection attacks. The affected component is a CGI binary handler (/cgi-bin/mbox-config) in the Comfast CF-AC100 wireless router firmware version 2.6.0.8. The vulnerable function processes the 'method=SET&section=wireless_device_dissoc' parameters without properly escaping shell metacharacters, allowing an attacker to inject shell commands that are executed in the context of the router's web server process. This is a classic OS command injection vulnerability where user-supplied input is passed unsanitized to system() or similar shell execution functions.

RemediationAI

No official patch is available from Comfast as the vendor did not respond to early disclosure. Organizations should consider replacing or retiring affected CF-AC100 units with alternative wireless routers from vendors with active security support. If continued use is mandatory, implement compensating controls: (1) Restrict network access to the CGI interface via firewall rules, allowing administrative access only from trusted IP ranges; (2) Disable remote management features if not required and ensure administrative access is limited to local network only; (3) Monitor router logs for suspicious CGI requests to /cgi-bin/mbox-config with unusual parameter values; (4) Implement network segmentation to isolate the router from critical systems. Until replacement, do not expose the management interface to untrusted networks.