Vulnerabilities in Node.js and Brotli Affecting Cisco Products: October 2026
cisco-sa-oct2026-node-js-Jj3SQ19u
Summary
A vulnerability in the API of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to view sensitive information on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient validation of user-supplied parameters in API requests. An attacker could exploit this vulnerability by sending a crafted API request to an affected device.
A successful exploit could allow the attacker to gain access to sensitive information, including hashed credentials that could be used in future attacks. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of September 16, 2026, Security Advisories.
In addition, for further documentation of improvements and fixes in Cisco Identity Services Engine, see Cisco Identity Services Engine Security Hardening Release: September 2026. Security Impact Rating: Medium CVE: CVE-2026-20235
Products covered
A separate affected-products list was not included in the collected bulletin.
Remediation
Cisco has released software updates that address this vulnerability.
CVEs in this advisory 1
Update history
What changed in later vendor updates
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Updates
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