Medium severity · published Oct 21, 2021
CVE-2021-34738
Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine (ISE) Software could allow an attacker to conduct a cross-site scripting (XSS)…
6.1
CVSS
0.6%
EPSS
No
On KEV
Description
Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine (ISE) Software could allow an attacker to conduct a cross-site scripting (XSS) attack against a user of the interface. For more information about these vulnerabilities, see the Details section of this advisory.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
Required
Confidentiality
Low
Integrity
Low
Availability
None
Scope
Changed
Exploitation
Is it being used?
Exploit prediction (EPSS)0.6% · higher than 49% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
IS
Identity Services Engine · Cisco
before 2.6.0; 2.6.0; 2.6.0; 2.6.0; 2.6.0; 2.6.0; +19 more · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-34738
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-34738
Vendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-xss1-rgxYry2V
More from Identity Services Engine
10.0
CVE-2026-76460
Cisco Identity Services Engine Authentication Bypass Vulnerability
10.0
CVE-2025-20337
Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
10.0
CVE-2025-20281
Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
10.0
CVE-2026-20130
Cisco Identity Services Engine Hardening Release - Improper Neutralization Vulnerabilities
10.0
CVE-2026-20192
Cisco Identity Services Engine Hardening Release - Access Control Vulnerabilities
