CVE-2026-20029: Cisco Identity Services Engine XML External Entity Processing Information Disclosure Vulnerability
- Is it exploited?
Reported, not confirmed by CISA. VulnCheck KEV lists it as exploited in the wild. CISA has not added it to its Known Exploited Vulnerabilities catalog as of .
VulnCheck KEV lists it since . It cites 1 public report, the first from .
- How likely is exploitation in the next 30 days?
- 6.1%
Down from 6.2% on .
EPSS score, percentile 93.4 of all scored records. A probability estimated by FIRST, not a report of exploitation.
- How severe?
- 4.9 Medium
CVSS v3.1 base score, given by the CNA
- What should I do?
CISA has set no required action, because the vulnerability is not in KEV.
The CVE record links no vendor advisory, patch or mitigation.
- Which versions are affected?
Affected
- 3.1.0
- 3.1.0 p1
- 3.1.0 p3
- 3.1.0 p2
- 3.2.0
- 3.1.0 p4
and 6 more in the table below
Source: CISA KEV 2026.10.29, as of ; VulnCheck KEV, as of ; FIRST EPSS, as of ; CVE List, as of . About the data.
Description
Cisco Identity Services Engine XML External Entity Processing Information Disclosure Vulnerability
A vulnerability in the licensing features of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker with administrative privileges to gain access to sensitive information. This vulnerability is due to improper parsing of XML that is processed by the web-based management interface of Cisco ISE and Cisco ISE-PIC. An attacker could exploit this vulnerability by uploading a malicious file to the application. A successful exploit could allow the attacker to read arbitrary files from the underlying operating system that could include sensitive data that should otherwise be inaccessible even to administrators. To exploit this vulnerability, the attacker must have valid administrative credentials.
Source: CVE List, as of . About the data.
What to do
Advisories and patches
The CVE record links no vendor advisory, patch or mitigation.
This summary is based on the CVE record as of . Check the vendor's advisory before you act: affected versions and fixes can change.
Affected products and versions
Versions by product, as listed in the CVE record (1 product)
| Status | Versions |
|---|---|
| Affected | 3.1.0 |
| Affected | 3.1.0 p1 |
| Affected | 3.1.0 p3 |
| Affected | 3.1.0 p2 |
| Affected | 3.2.0 |
| Affected | 3.1.0 p4 |
| Affected | 3.1.0 p5 |
| Affected | 3.2.0 p1 |
| Affected | 3.1.0 p6 |
| Affected | 3.2.0 p2 |
| Affected | 3.1.0 p7 |
| Affected | 3.3.0 |
Versions not listed are: unknown.
And 19 more version entries in the CVE record.
Source: CVE List, as of . About the data.
Weakness
CWE-611
CWE and CAPEC are maintained by MITRE; the entries are those named in the CVE record.
Timeline
| Date | Event |
|---|---|
| CVE record published |
References
1
Known exploited Cisco vulnerabilities
- CVE-2026-76418: Cisco Secure Firewall ASA Software and Cisco Secure FTD Software Unchecked Return Value to NULL Pointer Dereference Vulnerability
- CVE-2026-76519: Cisco Secure Email Gateway Relative Path Traversal Vulnerability
- CVE-2026-76504: Cisco Catalyst SD-WAN Manager Hex Encoding Vulnerability
- CVE-2026-76460: Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
- CVE-2026-76461: Cisco Secure Email Gateway SQL Injection Vulnerability