CVE-2026-20128
Description
A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an unauthenticated, remote attacker to gain DCA user privileges on an affected system.
This vulnerability is due to the presence of a credential file for the DCA user on an affected system. An attacker could exploit this vulnerability by sending a crafted HTTP request and reading the file that contains the DCA password from that affected system. A successful exploit could allow the attacker to access another affected system and gain DCA user privileges.
Note: Cisco Catalyst SD-WAN Manager releases 20.18 and later are not affected by this vulnerability.
Summary dbcve.org
An unauthenticated remote attacker can send a crafted HTTP request to Cisco Catalyst SD-WAN Manager to read a file containing the DCA (Data Collection Agent) user password. This credential exposure allows the attacker to gain DCA user privileges on the affected system.
Mitigation
Upgrade to Cisco Catalyst SD-WAN Manager release 20.18 or later, or implement network segmentation and access controls to limit exposure to the vulnerable HTTP endpoint until patching is possible.