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CVE-2026-20128

Cisco Catalyst SD-WAN Manager Storing Passwords in a Recoverable Format Vulnerability

Cisco Catalyst SD-WAN Manager CWE-257

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
High
EPSS — Exploit Probability
6.9%
Riskier than 94% of all CVEs · checked 2026-09-08
Exploitation
Confirmed in the wild
KEV since 2026-04-20
Remediation
Patch available
Federal deadline 2026-04-23
CISA required action

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. Deadline for federal agencies: 2026-04-23.

NVD entry Vendor patch PoC / advisory CISA KEV

8 articles across 7 outlets · first covered Apr 21, 2026 · latest Apr 21, 2026

Coverage timeline

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