Cisco Identity Services Engine MnTRESTLivelogService XML External Entity Processing Information Disclosure Vulnerability

September 18th, 2026
ZDI-26-718 ZDI-CAN-31322

CVE ID

CVE-2026-20235

CVSS Score

4.9 AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N

Affected Vendors

Cisco

Affected Products

Identity Services Engine

Vulnerability Details

This vulnerability allows remote attackers to disclose sensitive information on affected installations of Cisco Identity Services Engine. Authentication is required to exploit this vulnerability.

The specific flaw exists within the MnTRESTLivelogService class. Due to the improper restriction of XML External Entity (XXE) references, a crafted document specifying a URI causes the XML parser to access the URI and embed the contents back into the XML document for further processing. An attacker can leverage this vulnerability to disclose information in the context of the service account.

Additional Details

Cisco has issued an update to correct this vulnerability. More details can be found at:
https://www.cisco.com/c/en/us/support/docs/csa/cisco-sa-ise-inf-disc-LFWvcCu.html

Disclosure Timeline

  • 2026-05-28 - Vulnerability reported to vendor
  • 2026-09-18 - Coordinated public release of advisory
  • 2026-09-18 - Advisory Updated

Credit

Jonathan Lein of TrendAI Research

Back to Advisories