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CVE-2021-34706

MEDIUM · CVSS 6.4EPSS 0.7%EU EUVD

A vulnerability in the web-based management interface of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to access sensitive information or conduct a server-side request forgery (SSRF) attack through an affected device. This vulnerability is due to improper handling of XML External Entity (XXE) entries when parsing certain XML files. An attacker could exploit this vulnerability by uploading a crafted XML file that contains references to external entities. A successful exploit could allow the attacker to retrieve files from the local system, resulting in the disclosure of sensitive information, or cause the web application to perform arbitrary HTTP requests on behalf of the attacker.

Key facts

CVSS score
6.4 (v3.1)
Severity
MEDIUM
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N
Weakness (CWE)
CWE-611
EPSS score
0.7% (54th percentile)
In CISA KEV
No
In EU EUVD
Yes (EUVD-2021-21356)
Published
October 6, 2021
NVD last modified
June 17, 2026
Status
Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2021-21356 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

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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CVE-2021-34706: MEDIUM severity (CVSS 6.4)