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CVE-2021-34759

MEDIUM · CVSS 4.8EPSS 0.6%EU EUVD

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) Software could allow an authenticated, remote attacker with administrative credentials to conduct a cross-site scripting (XSS) attack against a user of the interface. This vulnerability exists because the web-based management interface does not properly validate user-supplied input. 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 interface or access sensitive, browser-based information. To exploit this vulnerability, an attacker would need valid administrative credentials.

Key facts

CVSS score
4.8 (v3.1)
Severity
MEDIUM
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-79
EPSS score
0.6% (47th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2021-21409)
Published
September 2, 2021
NVD last modified
June 17, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-21409 in the EU Vulnerability Database. Last updated in EUVD on November 7, 2024.

View on the EU Vulnerability Database

Affected products

  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine
  • cisco / identity services engine

and 7 more…

Certified products that may be affected

2 FIPS 140 or Common Criteria certified products, from automated matching by sec-certs.org.

References

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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