CVE-2026-20047
BaseFortify
Publication date: 2026-01-15
Last updated on: 2026-01-15
Assigner: Cisco Systems, Inc.
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| cisco | identity_services_engine | to 3.2 (exc) |
| cisco | ise_passive_identity_connector | to 3.2 (exc) |
| cisco | identity_services_engine | 3.2 |
| cisco | identity_services_engine | 3.3 |
| cisco | identity_services_engine | 3.4 |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-80 | The product receives input from an upstream component, but it does not neutralize or incorrectly neutralizes special characters such as "<", ">", and "&" that could be interpreted as web-scripting elements when they are sent to a downstream component that processes web pages. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a medium-severity cross-site scripting (XSS) issue in the web-based management interface of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC). It occurs because the interface does not properly validate user-supplied input, allowing an authenticated remote attacker with valid administrative credentials to inject malicious script code into specific pages. Exploiting this vulnerability lets the attacker execute arbitrary scripts in the context of the interface or access sensitive browser-based information. [1]
How can this vulnerability impact me? :
If exploited, this vulnerability could allow an attacker with administrative credentials to run arbitrary scripts within the web interface, potentially leading to unauthorized access to sensitive information stored in the browser or manipulation of the interface. This could compromise the security and integrity of the management system and expose sensitive data to the attacker. [1]
How can this vulnerability be detected on my network or system? Can you suggest some commands?
There are no specific detection commands or network/system detection methods provided for this vulnerability. Detection would generally require verifying the version of Cisco Identity Services Engine (ISE) or Cisco ISE Passive Identity Connector (ISE-PIC) in use to see if it is earlier than the fixed releases (3.2 Patch 8, 3.3 Patch 8, 3.4 Patch 4). Since exploitation requires valid administrative credentials and involves injecting malicious scripts into the web interface, monitoring for unusual administrative interface activity or script injections could be helpful, but no explicit commands are provided. [1]
What immediate steps should I take to mitigate this vulnerability?
The immediate mitigation step is to upgrade affected Cisco ISE or ISE-PIC installations to the fixed software versions: 3.2 Patch 8, 3.3 Patch 8, or 3.4 Patch 4. Versions 3.5 and later are not affected. There are no workarounds available. Customers should obtain fixed software through Cisco or authorized partners and ensure compatibility with their hardware and software configurations before upgrading. [1]