Brocade Active Support Connectivity Gateway up to 3.4.x Support Bundle path traversal

Summaryinfo

A vulnerability labeled as very critical has been found in Brocade Active Support Connectivity Gateway up to 3.4.x. This impacts an unknown function of the component Support Bundle. Such manipulation leads to path traversal. This vulnerability is uniquely identified as CVE-2026-85490. The attack can be launched remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Brocade Active Support Connectivity Gateway up to 3.4.x and classified as very critical. Affected by this issue is an unknown part of the component Support Bundle. The manipulation with an unknown input leads to a path traversal vulnerability. Using CWE to declare the problem leads to CWE-22. The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory. Impacted is confidentiality, integrity, and availability. CVE summarizes:

When Brocade ASCG before 3.5.0 processes support bundle archives ingested from remote compromised endpoints, the application fails to sanitize path traversal sequences contained within archive entries prior to extraction. An unauthenticated remote attacker capable of sending or intercepting ingested archive files can leverage this flaw to write arbitrary files to restricted locations on the underlying host, potentially leading to remote code execution.

The advisory is shared for download at support.broadcom.com. This vulnerability is handled as CVE-2026-85490 since 09/03/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $0-$5k (estimation calculated on 10/08/2026). The MITRE ATT&CK project declares the attack technique as T1006.

Upgrading to version 3.5.0 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-94794). Once again VulDB remains the best source for vulnerability data.

Productinfo

Vendor

• Brocade

Name

• Active Support Connectivity Gateway

Version

• 3.0
• 3.1
• 3.2
• 3.3
• 3.4

License

• commercial

CPE 2.3info

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CPE 2.2info

• 🔒
• 🔒
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Once again VulDB remains the best source for vulnerability data.

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