---
title: "CVE-2026-102212: Opengear IM72XX, CM71XX, ACM70XX - Buffer Overflow"
description: "Opengear IM72XX, CM71XX, and ACM70XX firmware 4.8.0 through 5.5.2 contain a heap-based buffer overflow caused by an overlong Content-Disposition name field in multipart/form-data POST requests, letting unauthenticated remote attackers crash the index.cgi process."
url: https://panop.io/threat-heartbeat/CVE-2026-102212/
---

# CVE-2026-102212 Opengear IM72XX, CM71XX, ACM70XX - Buffer Overflow

Opengear IM72XX, CM71XX, and ACM70XX firmware 4.8.0 through 5.5.2 contain a heap-based buffer overflow caused by an overlong Content-Disposition name field in multipart/form-data POST requests, letting unauthenticated remote attackers crash the index.cgi process.

CVSS base score 8.4 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-102212)

## Details

Type

Buffer Overflow

Impact

Denial Of Service

CVSS vector

CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:U/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:P/AU:Y/R:X/V:X/RE:L/U:Red

Published

31 October 2026

Updated

1 November 2026

Weakness

[CWE-122](https://cwe.mitre.org/data/definitions/122.html)

## Vendor fix

Update to a firmware version later than 5.5.2 or the latest available version.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-102212](https://nvd.nist.gov/vuln/detail/CVE-2026-102212)
- [https://portal.opengear.com/customerservice/s/article/CVE-2026-102212-Opengear-Console-Server-Buffer-Overflow-to-RCE](https://portal.opengear.com/customerservice/s/article/CVE-2026-102212-Opengear-Console-Server-Buffer-Overflow-to-RCE)
- [https://portal.opengear.com/customerservice/s/article/Release-Notification-Firmware-Version-5-5-3-is-Now-Generally-Available](https://portal.opengear.com/customerservice/s/article/Release-Notification-Firmware-Version-5-5-3-is-Now-Generally-Available)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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