XXE in Cisco Identity Services Engine Software

CVE-2021-34706

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.

Vulnerability class: XXE (XML External Entity)

EPSS: 0.007 (50.0th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2021-34706?
CVE-2021-34706 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 6.4/10. Published 2021-10-06.
How severe is CVE-2021-34706?
Medium severity. CVSS v3 base score is 6.4 out of 10.