XML External Entity injection in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20224

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Main Vulnerability Database Vulnerabilities #VU131451

XML External Entity injection in Catalyst SD-WAN Manager (formerly SD-WAN vManage) - CVE-2026-20224

Published: May 14, 2026


Vulnerability identifier: #VU131451
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:L/SI:N/SA:N/E:U/U:Amber
CVE-ID: CVE-2026-20224
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: Cisco Systems, Inc
Affected software:
Catalyst SD-WAN Manager (formerly SD-WAN vManage)

Detailed vulnerability description

The vulnerability allows a remote attacker to read arbitrary files.

The vulnerability exists due to improper handling of XML external entity entries in the web UI when parsing an XML file. A remote attacker can send a crafted request to read arbitrary files.


How to mitigate CVE-2026-20224

Install security update from vendor's website.

Sources