---
id: "CVE-2026-20128"
kind: "vulnerability"
aliases: ["CVE-2026-20128"]
title: "A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an\u2026"
severity: "high"
cvss: 7.5
epss: null
exploited: true
status: "open"
category: "vendor"
products: [{"name": "cisco catalyst sd-wan manager", "fixed": ["20.9.8.2"], "affected": "< 20.9.8.2", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.12.5.3"], "affected": ">= 20.10, < 20.12.5.3", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.15.4.2"], "affected": ">= 20.13, < 20.15.4.2", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": ["20.18"], "affected": ">= 20.16, < 20.18", "ecosystem": "vendor"}, {"name": "cisco catalyst sd-wan manager", "fixed": [], "affected": "= 20.12.6", "ecosystem": "vendor"}, {"name": "Cisco Catalyst SD-WAN Manager", "fixed": [], "affected": "", "ecosystem": "vendor"}]
ecosystems: ["vendor"]
tags: ["catalyst-sd-wan", "cisco", "exploited", "sd-wan-manager", "vendor"]
not_affected_if: ["no-sd-wan-manager-deployed"]
published_at: "2026-02-25T17:25:30+00:00"
first_seen_at: "2026-10-23T19:11:51+00:00"
updated_at: "2026-10-24T00:09:50+00:00"
sources: [{"source": "kev", "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20128", "first_seen_at": "2026-10-23T19:11:51+00:00"}, {"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20128", "first_seen_at": "2026-10-23T23:44:51+00:00"}]
---

# A vulnerability in the Data Collection Agent (DCA) feature of Cisco Catalyst SD-WAN Manager could allow an…

Cisco Catalyst SD-WAN Manager stores the DCA user's password in a recoverable format on the filesystem. An attacker with a low-privileged local account can read that credential file and gain DCA user privileges.

_Summary, check and fix written by a model from the sources; labelled as such._

## Affected

- vendor:cisco catalyst sd-wan manager affected < 20.9.8.2 fixed 20.9.8.2
- vendor:cisco catalyst sd-wan manager affected >= 20.10, < 20.12.5.3 fixed 20.12.5.3
- vendor:cisco catalyst sd-wan manager affected >= 20.13, < 20.15.4.2 fixed 20.15.4.2
- vendor:cisco catalyst sd-wan manager affected >= 20.16, < 20.18 fixed 20.18
- vendor:cisco catalyst sd-wan manager affected = 20.12.6 fixed ?
- vendor:Cisco Catalyst SD-WAN Manager affected ? fixed ?

## Timeline

- 2026-10-23T19:11:51+00:00 kev https://www.cisa.gov/known-exploited-vulnerabilities-catalog?search_api_fulltext=CVE-2026-20128
- 2026-10-23T23:44:51+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-20128

## From the sources

Cisco Catalyst SD-WAN Manager contains a storing passwords in a recoverable format vulnerability that allows an authenticated, local attacker to gain DCA user privileges by accessing a credential file for the DCA user on the filesystem as a low-privileged user.

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.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_