---
title: "CVE-2026-20128: Cisco Catalyst SD-WAN Manager Information… | CubePath"
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…"
language: en
source: https://cubepath.com/security/cve/CVE-2026-20128
---

# CVE-2026-20128: Cisco Catalyst SD-WAN Manager Information… | CubePath

## 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.

Official description from the CVE record, published by cisco. Copyright © 1999-2026 The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CVE license. [View the record on cve.org](https://www.cve.org/CVERecord?id=CVE-2026-20128)

## Key data

### CVSS 3.1 High 7.5

Score published by cisco in the CVE record.

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

| Metric                 | Value   | What it means                                                                             |
| ---------------------- | ------- | ----------------------------------------------------------------------------------------- |
| Attack vector          | Local   | The attacker needs local access to the system, or to trick a user into running something. |
| Attack complexity      | High    | The attack depends on conditions outside the attacker's control, so it takes preparation. |
| Privileges required    | High    | An account with significant privileges, such as an administrator, is needed.              |
| User interaction       | None    | No action from any user is needed.                                                        |
| Scope                  | Changed | The impact can reach other components beyond the vulnerable one.                          |
| Confidentiality impact | High    | Serious or total effect on the secrecy of data.                                           |
| Integrity impact       | High    | Serious or total effect on the trustworthiness of data.                                   |
| Availability impact    | High    | Serious or total effect on availability.                                                  |

CVSS is owned and managed by FIRST.Org, Inc. (FIRST) and is used by permission. Each CVSS score on this site is shown together with its vector string, as published in the CVE record by the source named next to it. Learn more at [first.org/cvss](https://www.first.org/cvss/) .

### EPSS

Exploit Prediction Scoring System by FIRST: an estimate of the probability that exploitation activity will be observed in the next 30 days.

Score

0.08349 (8.3% probability)

Percentile

95.0%

Scores of

Nov 10, 2026

Model

v2026.06.15

### CISA Known Exploited Vulnerabilities

This CVE is listed in the CISA KEV catalog.

Name in the catalog

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

Added to the catalog

Apr 20, 2026

Federal due date

Apr 23, 2026

### CISA assessment as of Feb 25, 2026

Stakeholder-Specific Vulnerability Categorization (SSVC) decision points added by CISA.

Exploitation

Recorded by CISA as active

Automatable

no

Technical impact

total

### Weakness (CWE)

CWE catalog version 5.0.

CWE names: Copyright © 2006-2026, The MITRE Corporation. See [/security/cve/legal](https://cubepath.com/security/cve/legal) for the CWE license.

- [CWE-257](https://cwe.mitre.org/data/definitions/257.html) Storing Passwords in a Recoverable Format

## Affected products

Products listed in the CVE record, as the CNA published them.

- Cisco Catalyst SD-WAN Manager

  - affected: 20.1.12
  - affected: 19.2.1
  - affected: 18.4.4
  - affected: 18.4.5
  - affected: 20.1.1.1
  - affected: 20.1.1
  - affected: 19.3.0
  - affected: 19.2.2
  - affected: 19.2.099
  - affected: 18.3.6
  - affected: 18.3.7
  - affected: 19.2.0
  - affected: 18.3.8
  - affected: 19.0.0
  - affected: 19.1.0
  - affected: 18.4.302
  - affected: 18.4.303
  - affected: 19.2.097
  - affected: 19.2.098
  - affected: 17.2.10
  - affected: 18.3.6.1
  - affected: 19.0.1a
  - affected: 18.2.0
  - affected: 18.4.3
  - affected: 18.4.1
  - and 111 more

## References

Links listed in the CVE record. They lead to other sites, which CubePath does not control.

- [cisco-sa-sdwan-authbp-qwCX8D4v](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-authbp-qwCX8D4v)  (sec.cloudapps.cisco.com)

## Timeline

1. ID reserved Oct 8, 2025
2. Record published Feb 25, 2026
3. Added to CISA KEV Apr 20, 2026
4. Record last updated Apr 21, 2026

## Look up another CVE

## About CubePath

CubePath is a cloud provider with data centers in Europe and the United States. It offers VPS, bare metal servers and DDoS protection.

[Cloud VPS](https://cubepath.com/vps) [DDoS protection](https://cubepath.com/ddos-protection)

Data from the CVE Program (MITRE), CISA KEV and FIRST EPSS. CVSS is owned by FIRST and used by permission. Not affiliated with or endorsed by MITRE, CISA or FIRST. Data as of Nov 10, 2026, 19:11 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)