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: 8.7 [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]
CVE-ID: CVE-2026-20224
CWE-ID: CWE-611
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
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.
Affected software
Catalyst SD-WAN Manager (formerly SD-WAN vManage)
How to mitigate CVE-2026-20224
Install security update from vendor's website.
Catalyst SD-WAN Manager (formerly SD-WAN vManage) - addressed in versions 20.15.4.3, 20.15.5.1, 20.18.2.2, 26.1.1