---
title: "CVE-2026-20122: Cisco Catalyst SD-WAN Manager Arbitrary… | CubePath"
description: "A vulnerability in the API of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to overwrite arbitrary files on the local file…"
language: en
source: https://cubepath.com/security/cve/CVE-2026-20122
---

# CVE-2026-20122: Cisco Catalyst SD-WAN Manager Arbitrary… | CubePath

## Description

A vulnerability in the API of Cisco Catalyst SD-WAN Manager could allow an authenticated, remote attacker to overwrite arbitrary files on the local file system. To exploit this vulnerability, the attacker must have valid read-only credentials with API access on the affected system. This vulnerability is due to improper file handling on the API interface of an affected system. An attacker could exploit this vulnerability by uploading a malicious file on the local file system. A successful exploit could allow the attacker to overwrite arbitrary files on the affected system and gain vmanage user privileges.

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-2026-20122)

## Key data

### CVSS 3.1 Medium 5.4

Score published by cisco in the CVE record.

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

| Metric                 | Value     | What it means                                                                       |
| ---------------------- | --------- | ----------------------------------------------------------------------------------- |
| Attack vector          | Network   | The vulnerable component can be reached over a network, possibly from the Internet. |
| Attack complexity      | Low       | No special conditions are needed. The attack can be repeated at will.               |
| Privileges required    | Low       | A basic user account is needed.                                                     |
| User interaction       | None      | No action from any user is needed.                                                  |
| Scope                  | Unchanged | The impact stays within the vulnerable component.                                   |
| Confidentiality impact | Low       | Limited effect on the secrecy of data.                                              |
| Integrity impact       | Low       | Limited effect on the trustworthiness of data.                                      |
| Availability impact    | None      | No 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

0.25801 (25.8% probability)

Percentile

98.0%

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 Incorrect Use of Privileged APIs Vulnerability

Added to the catalog

Apr 20, 2026

Federal due date

Apr 23, 2026

### CISA assessment as of Mar 5, 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-648](https://cwe.mitre.org/data/definitions/648.html) Incorrect Use of Privileged APIs

## 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 310 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, 19:59 UTC. [Sources and licenses](https://cubepath.com/security/cve/legal)