XXE in Cisco Identity Services Engine Software
CVE-2026-76446
A vulnerability in an API of Cisco ISE and Cisco ISE-PIC could allow an authenticated, remote attacker to read specific files on the underlying operating system of an affected device. This vulnerability is due to improper restriction of XML external entity references. An attacker could exploit this vulnerability by sending a crafted request to an affected device. A successful exploit could allow the attacker to read specific files on the affected system that the underlying process has permission to access.
Vulnerability class: XXE (XML External Entity)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.9 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.004 (31.6th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 32nd percentile — 31.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Cisco Identity Services Engine Software — versions 3.1.0, 3.1.0 p1, 3.1.0 p10
- Cisco Ise Passive Identity Connector — versions 3.1.0, 3.2.0, 3.3.0
- Cisco Identity Services Engine — versions 3.3.0, 3.4.0, 3.5.0
- Cisco Identity Services Engine Passive Connector — versions 3.3.0, 3.4.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-76446?
- CVE-2026-76446 is a medium-severity vulnerability in Cisco Identity Services Engine Software, classified under Improper Restriction of XML External Entity Reference (XXE). CVSS score: 4.9/10. Published 2026-09-16.
- How severe is CVE-2026-76446?
- Medium severity. CVSS v3 base score is 4.9 out of 10.