---
id: "CVE-2026-102212"
kind: "vulnerability"
aliases: ["CVE-2026-102212"]
title: "Opengear console servers: overflow lets remote attacker crash index.cgi"
severity: "high"
cvss: 8.4
epss: null
exploited: false
status: "open"
category: "infrastructure"
products: []
ecosystems: []
tags: ["console-server", "firmware", "infrastructure", "network-appliance", "opengear"]
not_affected_if: ["firmware-outside-4.8.0-5.5.2", "management-interface-not-reachable"]
published_at: "2026-10-31T16:16:52+00:00"
first_seen_at: "2026-10-31T16:36:24+00:00"
updated_at: "2026-10-31T16:37:08+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-102212", "first_seen_at": "2026-10-31T16:36:24+00:00"}]
---

# Opengear console servers: overflow lets remote attacker crash index.cgi

Opengear IM72XX, CM71XX and ACM70XX console server firmware versions 4.8.0 through 5.5.2 contain a heap buffer overflow in the web interface. An unauthenticated remote attacker can send a crafted multipart POST to crash the index.cgi process.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the firmware version on the appliance (IM72XX, CM71XX, ACM70XX) against the affected range `4.8.0` through `5.5.2`.
- Confirm whether the web management interface (index.cgi) is reachable from untrusted networks.

## Fix

- Firmware versions `4.8.0` through `5.5.2` are affected; the NVD entry does not state a fixed version.

## Timeline

- 2026-10-31T16:36:24+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-102212

## From the sources

Heap-based buffer overflow in Opengear IM72XX, CM71XX, and ACM70XX firmware versions 4.8.0 through 5.5.2 on console server appliances allows an unauthenticated remote attacker to crash the index.cgi process via a crafted multipart/form-data POST request containing an overlong Content-Disposition name field.

---

_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_