Cisco Identity Services Engine Software up to 3.4.0 cross site scripting

Summaryinfo

A vulnerability, which was classified as problematic, has been found in Cisco Identity Services Engine Software. This vulnerability affects unknown code. This manipulation causes cross site scripting. This vulnerability is tracked as CVE-2026-20076. The attack is possible to be carried out remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Cisco Identity Services Engine Software. It has been declared as problematic. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a cross site scripting vulnerability. The CWE definition for the vulnerability is CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. As an impact it is known to affect integrity. The summary by CVE is:

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to conduct a stored cross-site scripting (XSS) attack against a user of the interface. This vulnerability is due to insufficient validation of user-supplied input by the web-based management interface of an affected system. An attacker could exploit this vulnerability by injecting malicious code into specific pages of the interface. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. To exploit this vulnerability, the attacker must have valid administrative credentials.

The advisory is shared at sec.cloudapps.cisco.com. This vulnerability is known as CVE-2026-20076 since 10/08/2025. The exploitation appears to be easy. The attack can be launched remotely. Additional levels of successful authentication are required for exploitation. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at CERT Bund (WID-SEC-2026-0128). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Affected

• Cisco Identity Services Engine (ISE)

Productinfo

Type

• Policy Management Software

Vendor

• Cisco

Name

• Identity Services Engine Software

Version

• 3.1.0
• 3.1.0 p1
• 3.1.0 p2
• 3.1.0 p3
• 3.1.0 p4
• 3.1.0 p5
• 3.1.0 p6
• 3.1.0 p7
• 3.1.0 p8
• 3.1.0 p9
• 3.1.0 p10
• 3.2.0
• 3.2.0 p1
• 3.2.0 p2
• 3.2.0 p3
• 3.2.0 p4
• 3.2.0 p5
• 3.2.0 p6
• 3.2.0 p7
• 3.3.0
• 3.4.0

License

• commercial

Website

• Vendor: https://www.cisco.com/

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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