CVE DATABASE / CVE-2026-20128

CVE-2026-20128

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

CVSS 7.5 · HIGH ⚠ CISA KEV — ACTIVELY EXPLOITED

On the CISA KEV catalog

Confirmed exploited in the wild. Added 2026-04-20. Federal remediation due 2026-04-23.
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.

Summary

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 3.1 breakdown

Base score	7.5 (HIGH)
Vector	CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H
Attack vector	LOCAL
Attack complexity	HIGH
Privileges required	HIGH
User interaction	NONE
Scope	CHANGED
Confidentiality	HIGH
Integrity	HIGH
Availability	HIGH

Weakness type (CWE)

CWE-257

Affected products

Cisco catalyst sd-wan manager

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References

Data: NIST NVD + CISA KEV. NVD last modified 2026-04-21. Always verify against the vendor advisory before acting.