---
id: CVE-2021-1432
title: >-
  A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an
  authenticated, local attacker to execute arbitrary commands on the underlying
  operating system as the root user
summary: >-
  A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an
  authenticated, local attacker to execute arbitrary commands on the underlying
  operating system as the root user. The attacker must be authenticated on the
  affected…
severity: high
cvss: 7.3
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H'
cwe:
  - CWE-20
  - CWE-74
vendor: cisco
product: ios_xe
affected:
  - ios_xe = 3.15.1xbs
  - ios_xe = 3.15.2xbs
  - ios_xe = 16.12.1
  - ios_xe = 16.12.1a
  - ios_xe = 16.12.1c
  - ios_xe = 16.12.1s
  - ios_xe = 16.12.1t
  - ios_xe = 16.12.1w
  - ios_xe = 16.12.1x
  - ios_xe = 16.12.1y
  - ios_xe = 16.12.1z
  - ios_xe = 16.12.1za
  - ios_xe = 16.12.2
  - ios_xe = 16.12.2a
  - ios_xe = 16.12.2s
  - ios_xe = 16.12.2t
  - ios_xe = 16.12.3
  - ios_xe = 16.12.3a
  - ios_xe = 16.12.3s
  - ios_xe = 16.12.4
  - ios_xe = 16.12.4a
  - ios_xe = 17.2.1
  - ios_xe = 17.2.1a
  - ios_xe = 17.2.1r
  - ios_xe = 17.2.1v
  - ios_xe_sd-wan
published: '2021-03-24'
updated: '2026-10-07'
sourceUpdated: '2026-10-07T10:52:45.003'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2021-1432'
references:
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-sdwarbcmdexec-sspOMUr3
    label: psirt@cisco.com
  - url: >-
      https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxe-sdwarbcmdexec-sspOMUr3
    label: af854a3a-2127-422b-91ae-364da2661108
tags:
  - nvd
epss: 0.0034
epssPercentile: 0.25367
ingestedAt: '2026-10-07T11:26:47.619Z'
---

## Overview

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to execute arbitrary commands on the underlying operating system as the root user. The attacker must be authenticated on the affected device as a low-privileged user to exploit this vulnerability. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by injecting arbitrary commands to a file as a lower-privileged user. The commands are then executed on the device by the root user. A successful exploit could allow the attacker to execute arbitrary commands as the root user.

## Affected

- `ios_xe = 3.15.1xbs`
- `ios_xe = 3.15.2xbs`
- `ios_xe = 16.12.1`
- `ios_xe = 16.12.1a`
- `ios_xe = 16.12.1c`
- `ios_xe = 16.12.1s`
- `ios_xe = 16.12.1t`
- `ios_xe = 16.12.1w`
- `ios_xe = 16.12.1x`
- `ios_xe = 16.12.1y`
- `ios_xe = 16.12.1z`
- `ios_xe = 16.12.1za`
- `ios_xe = 16.12.2`
- `ios_xe = 16.12.2a`
- `ios_xe = 16.12.2s`
- `ios_xe = 16.12.2t`
- `ios_xe = 16.12.3`
- `ios_xe = 16.12.3a`
- `ios_xe = 16.12.3s`
- `ios_xe = 16.12.4`
- `ios_xe = 16.12.4a`
- `ios_xe = 17.2.1`
- `ios_xe = 17.2.1a`
- `ios_xe = 17.2.1r`
- `ios_xe = 17.2.1v`
- `ios_xe_sd-wan`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.