Live Exposure Defense: From CVE to Confirmed Exposure in 12 Hours – See more

Back
New CVE Detected

CVE-2026-76008 – Unauthenticated Stack-Based Buffer Overflow – Comfast CF-N1-S 2.6.0.1

Be the first to know when new zero-days emerge:

Subscribe to Email Alerts
Subscribe to RSS Feed

Summary

CVE-2026-76008 is a critical, unauthenticated stack-based buffer overflow vulnerability affecting the Comfast CF-N1-S wireless access point/router, version 2.6.0.1. The flaw resides in the device’s web management CGI interface and can be triggered remotely over the network without any credentials, allowing an attacker to corrupt process memory and potentially execute arbitrary code on the device. The vulnerability has been assigned the maximum CVSS v3.1 base score of 10.0 (Critical).

Technical details

  • Root cause: A stack-based buffer overflow (CWE-121) and associated memory corruption (CWE-119) in the get_para_from_uri function of the /cgi-bin/mbox-config CGI endpoint.
  • Trigger condition: The function fails to properly bound-check the width and height URI parameters supplied to /cgi-bin/mbox-config before copying them into a fixed-size stack buffer.
  • Attack vector: Network-based (AV:N). The endpoint is reachable without authentication (PR:N) and requires no user interaction (UI:N), meaning an attacker with network access to the device’s management interface can exploit it directly by sending a crafted HTTP request.
  • Impact: Successful exploitation can crash the CGI process (denial of service) or, depending on stack layout and mitigations present on the device, be leveraged to corrupt adjacent memory and potentially achieve arbitrary code execution, fully compromising confidentiality, integrity, and availability of the device.

Affected software

  • Comfast CF-N1-S — firmware version 2.6.0.1

Severity

  • CVSS v3.1 Base Score: 10.0 (Critical)
  • Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Mitigation and recommended actions

  • Immediate: No official vendor patch has been identified at the time of publication. Organizations should check the Comfast support portal regularly for a firmware update addressing this issue and apply it as soon as it becomes available.
  • If no patch is available:
    • Restrict network access to the device’s web management interface (/cgi-bin/mbox-config) to trusted management networks only; do not expose it to the internet.
    • Place affected devices behind a firewall or VPN, and disable remote/WAN-side administration if supported.
    • Monitor management interfaces for anomalous or malformed requests to /cgi-bin/mbox-config, particularly those containing unusual width/height parameter values.
    • Consider isolating or replacing affected devices in security-sensitive environments until a fix is released, given the unauthenticated, network-exploitable nature of this flaw.

References

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report

How IONIX’s External Exposure Management Platform Detects and Validates
Zero-Days to Shrink MTTR

1

Map your entire attack surface (continously)

IONIX uses multi-factor discovery methods, including DNS analysis, certificate mapping, metadata inspection, and more, to automatically map every internet-facing asset across your environment. This includes cloud instances, third-party platforms, shadow IT, and even forgotten infrastructure that traditional tools miss.

2

Monitor for new CVEs

Dozens of threat intel feeds using agentic technology are continuously analyzed to detect the appearance of proof-of-concept code, exploit kits, and indicators of active targeting. IONIX goes further by applying AI to proactively evaluate whether emerging vulnerabilities are likely to be exploited, even before PoCs go public.

3

Identify Potential External Exposures

Not all CVEs matter. IONIX filters vulnerabilities by asking attacker-centric questions: Can it be reached from the internet? Does it require authentication? Is it being exploited in the wild? This dramatically reduces noise and focuses teams on threats that can actually be weaponized.

4

Create Safe, Scalable Exploit Validations

IONIX transforms real-world PoCs into safe, non-intrusive test payloads that can be run in production environments without disruption. These simulations are precisely targeted to the systems that are vulnerable, ensuring rapid validation without unnecessary load.

5

Execute Exploit Validations

By combining context about software stack, versioning, exposure status, and reachability, IONIX ensures that only the right payloads are executed against the right assets, maximizing efficiency and minimizing risk.

6

Drive Fast and Actionable Remediation

Results are routed through integrations with ticketing, SOAR, and SIEM tools. Issues are written in plain language, bundled into remediation clusters, and prioritized based on asset criticality, exploitability, and blast radius. This shortens mean time to remediation (MTTR) and empowers teams to act with confidence.

Are you exposed?

Get a free report of your organization’s exposure to this CVE and threat

  • Mapping of all Assets with this Technology
  • Identification of potentially exposed assets to this CVE
  • Confirmation of verified exploitable assets
Get Exposure Report
Close

Subscribe to Threat Center RSS

Copy/paste the link below into your preferred RSS reader or follow these instructions to subscribe to Slack alerts.

Open RSS feedSlack setup instructions

Close

Get Real-Time CVE Alerts to Your Email

Be the first to know when new zero-days emerge