Opengear ACM7000/CM7100/IM7200 up to 5.5.2 Content-Disposition index.cgi name buffer overflow

Summaryinfo

A vulnerability was found in Opengear ACM7000, CM7100 and IM7200 up to 5.5.2. It has been classified as very critical. The affected element is an unknown function of the file index.cgi of the component Content-Disposition. Performing a manipulation of the argument Name results in buffer overflow. This vulnerability is reported as CVE-2026-102212. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability was found in Opengear ACM7000, CM7100 and IM7200 up to 5.5.2. It has been classified as very critical. This affects an unknown code block of the file index.cgi of the component Content-Disposition. The manipulation of the argument name with an unknown input leads to a buffer overflow vulnerability. CWE is classifying the issue as CWE-120. The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

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.

It is possible to read the advisory at portal.opengear.com. This vulnerability is uniquely identified as CVE-2026-102212 since 09/28/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 10/31/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-114719). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Vendor

• Opengear

Name

• ACM7000
• CM7100
• IM7200

Version

• 5.5.0
• 5.5.1
• 5.5.2

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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