Ravie LakshmananJun 16, 2026Vulnerability / Network Security
Cisco has released security updates for a medium-severity security flaw in Catalyst SD-WAN Manager that has come under active exploitation in the wild.
The vulnerability, tracked as CVE-2026-20262, carries a CVSS score of 6.5 out of 10.0.
"A vulnerability in the web UI of Cisco Catalyst SD-WAN Manager, formerly SD-WAN vManage, could allow an authenticated, remote attacker to create a file or overwrite any file on the filesystem of an affected system," Cisco said in an advisory.
The issue, the networking equipment company added, stems from inadequate validation of user-supplied input during a file upload process. An attacker could exploit this behavior to create or overwrite any file on the underlying operating system by sending crafted HTTP requests to an affected API endpoint.
