Credential Exposure Vulnerability in Cisco Catalyst SD-WAN Manager
CVE-2026-20128
Key Information:
- Vendor
Cisco
- Vendor
- CVE Published:
- 25 February 2026
Badges
What is CVE-2026-20128?
A vulnerability in Cisco Catalyst SD-WAN Manager's Data Collection Agent (DCA) feature allows an authenticated local attacker to gain unauthorized DCA user privileges. This security issue arises from the presence of a credential file containing the DCA password on the filesystem. If an attacker has valid credentials for vManage, they can access this file and exploit the vulnerability to elevate their privileges. This could potentially allow the attacker to gain access to other affected systems.
CISA has reported CVE-2026-20128
CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2026-20128 as being exploited but is not known by the CISA to be used in ransomware campaigns. This is subject to change at pace
The CISA's recommendation is: Please adhere to CISA’s guidelines to assess exposure and mitigate risks associated with Cisco SD-WAN devices as outlines in CISA’s Emergency Directive 26-03 (URL listed below in Notes) and CISA’s “Hunt & Hardening Guidance for Cisco SD-WAN Devices (URL listed below in Notes). Adhere to the applicable BOD 22-01 guidance for cloud services or discontinue use of the product if mitigations are not available.
Affected Version(s)
Cisco Catalyst SD-WAN Manager 20.1.12
Cisco Catalyst SD-WAN Manager 19.2.1
Cisco Catalyst SD-WAN Manager 18.4.4