CISA Known Exploited Vulnerability

This vulnerability is actively exploited in the wild and listed in the CISA Known Exploited Vulnerabilities catalog.

Remediation Deadline: Apr 23, 2026

CVE-2026-20128

High

CVSS 7.5CISA KEV

Cisco/Catalyst SD-WAN Manager

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.

CVSS Score

7.5/ 10

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H

Weakness Classification (CWE)

CWE-257CWE-257MITRE

Required Action

CISA Mitigation Instructions: https://www.cisa.gov/news-events/directives/ed-26-03-mitigate-vulnerabilities-cisco-sd-wan-systems ; https://www.cisa.gov/news-events/directives/supplemental-direction-ed-26-03-hunt-and-hardening-guidance-cisco-sd-wan-systems ; https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v ; https://nvd.nist.gov/vuln/detail/CVE-2026-20128

References (1)

https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4vpsirt@cisco.com

Risk Assessment

ELEVATED

In CISA KEV

Details

Severity: High
CVSS: 7.5
CWE: CWE-257
CISA KEV: Yes
Ransomware: Unknown
Articles: 3

Timeline

Published

Feb 25, 2026

Added to KEV

Apr 20, 2026

Remediation Due

Apr 23, 2026

Affected Product

Cisco

Catalyst SD-WAN Manager

View all Cisco CVEs

External Links

NVD (NIST)CVE Details MITRE CVE