CVE-2026-102212

Pre-Auth Heap Buffer Overflow in the Multipart Request

publishedCWE-122

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.

Technical severity8.4 highCVSS 4.0 · CNA: Digi

Published2026-10-31Source updated 2026-11-06

Collected2026-11-063 attributed sources

Fixes and workarounds

Fix

The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.

Source: CNA: Digi

Affected products and versions

Affected products, source version ranges and reporting authorities
Product	Versions	Authority
IM7200 Opengear Platforms: Linux	≥ 4.8; ≤ 5.5.2 (affected, firmware) Other versions: unaffected	CNA: Digi
CM7100 Opengear Platforms: Linux	≥ 4.8; ≤ 5.5.2 (affected, firmware) Other versions: unaffected	CNA: Digi
ACM7000 Opengear Platforms: Linux	≥ 4.8; ≤ 5.5.2 (affected, firmware) Other versions: unaffected	CNA: Digi

Version ranges are source assertions. Check the vendor advisory and your installed configuration before determining exposure.

CVSS assessments

CVSS scores, vectors and reporting authorities
Version / score	Vector	Authority
4.0 / 8.4 high	`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/S:P/AU:Y/RE:L/U:Red`	CNA: Digi
4.0 / 8.4 high	`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`	NVD: e8a6bb0b-e373-42b1-a5de-93e314325576

Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

References

https://portal.opengear.com/customerservice/s/article/Release-Notification-Firmware-Version-5-5-3-is-Now-Generally-AvailableCNA: Digi · patch
https://portal.opengear.com/customerservice/s/article/CVE-2026-102212-Opengear-Console-Server-Buffer-Overflow-to-RCECNA: Digi · vendor-advisory
https://portal.opengear.com/customerservice/s/article/CVE-2026-102212-Opengear-Console-Server-Buffer-Overflow-to-RCEe8a6bb0b-e373-42b1-a5de-93e314325576
https://portal.opengear.com/customerservice/s/article/Release-Notification-Firmware-Version-5-5-3-is-Now-Generally-Availablee8a6bb0b-e373-42b1-a5de-93e314325576

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