Detections
Analytics
CVE-2026-20128
high
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.
References
https://cyberscoop.com/cisco-firewall-sd-wan-vulnerabilities-exploited/
https://www.securityweek.com/recent-cisco-catalyst-sd-wan-vulnerability-now-widely-exploited/
https://www.theregister.com/2026/03/06/cisco_sdwan_bugs/
https://www.securityweek.com/cisco-warns-of-more-catalyst-sd-wan-flaws-exploited-in-the-wild/
https://www.helpnetsecurity.com/2026/03/05/cisco-cve-2026-20128-cve-2026-20122-exploited/
https://thehackernews.com/2026/03/cisco-confirms-active-exploitation-of.html
Details
Published: 2026-02-25
Updated: 2026-03-20
Risk Information
CVSS v2
Base Score: 5.9
Vector: CVSS2#AV:L/AC:H/Au:M/C:C/I:C/A:C
Severity: Medium
CVSS v3
Base Score: 7.5
Vector: CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Severity: High
EPSS
EPSS: 0.00014
Vulnerability Watch
Tenable Research has classified this CVE under the following Vulnerability Watch classification, which includes active and historical (inactive) classifications. You can learn more about these classifications on our blog.
Vulnerability of Interest