---
id: CVE-2021-34725
title: Cisco IOS XE SD-WAN Command Injection Vulnerability
summary: "A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to inject arbitrary commands to be executed with root-level privileges on the underlying operating system.\r\n\r\nThis vulnerability is due…"
severity: medium
cvss: 6.7
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H'
cvssSource: vendor
vendor: Cisco
product: Cisco 4000 Series Integrated Services Routers
affected:
  - 1100_series_industrial_integrated_services_routers
  - cloud_services_router_1000v_series
  - 1000_series_integrated_services_routers
  - asr_1000_series_aggregation_services_routers
  - 4000_series_integrated_services_routers
  - integrated_services_virtual_router
published: '2021-09-22'
updated: '2021-09-22'
sourceUpdated: '2021-09-22T16:00:00+00:00'
source: CSAF
sourceUrl: >-
  https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-maapi-privesc-KSUg7QSS
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-maapi-privesc-KSUg7QSS
  - url: 'https://software.cisco.com'
tags:
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00357
epssPercentile: 0.26919
ingestedAt: '2026-09-27T07:45:38.475Z'
---

## Overview

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to inject arbitrary commands to be executed with root-level privileges on the underlying operating system.

This vulnerability is due to insufficient input validation on certain CLI commands. An attacker could exploit this vulnerability by authenticating to an affected device and submitting crafted input to the CLI. The attacker must be authenticated as an administrative user to execute the affected commands. A successful exploit could allow the attacker to execute commands with root-level privileges.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.



This advisory is part of the September 2021 release of the Cisco IOS and IOS XE Software Security Advisory Bundled Publication. For a complete list of the advisories and links to them, see Cisco Event Response: September 2021 Semiannual Cisco IOS and IOS XE Software Security Advisory Bundled Publication. ["https://sec.cloudapps.cisco.com/security/center/viewErp.x?alertId=ERP-74581"]

## Vendor advisories

- **cisco-sa-sdwan-maapi-privesc-KSUg7QSS** · Cisco · affected: Cisco 1100 Series Industrial Integrated Services Routers, Cisco Cloud Services Router 1000V Series, Cisco 1000 Series Integrated Services Routers, Cisco ASR 1000 Series Aggregation Services Routers, Cisco 4000 Series Integrated Services Routers, Cisco Integrated Services Virtual Router · updated 2021-09-22 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-sdwan-maapi-privesc-KSUg7QSS)

**Cisco IOS XE SD-WAN Software Command Injection Vulnerability**. Released 2021-09-22.

Affected:

- Cisco 1100 Series Industrial Integrated Services Routers
- Cisco Cloud Services Router 1000V Series
- Cisco 1000 Series Integrated Services Routers
- Cisco ASR 1000 Series Aggregation Services Routers
- Cisco 4000 Series Integrated Services Routers
- Cisco Integrated Services Virtual Router

## Remediation

Cisco has released software updates that address this vulnerability. https://software.cisco.com