---
id: CVE-2026-20046
title: "A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local attacker to elevate privileges and gain full administrative control of an affected device.\r\n\r\nThis vulnerabi…"
summary: "A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local attacker to elevate privileges and gain full administrative control of an affected device.\r\n\r\nThis vulnerabi…"
severity: high
cvss: 8.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-264
vendor: cisco
product: ios_xr
affected:
  - ios_xr < 25.2.2
patched:
  - ios_xr 25.2.2
published: '2026-03-11'
updated: '2026-07-01'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20046'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-iosxr-privesc-bF8D5U4W
    label: psirt@cisco.com
tags:
  - nvd
epss: 0.00135
epssPercentile: 0.02409
ingestedAt: '2026-07-01T17:13:55.254Z'
---

## Overview

A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local attacker to elevate privileges and gain full administrative control of an affected device.

This vulnerability is due to incorrect mapping of a command to task groups within the source code. An attacker with a low-privileged account could exploit this vulnerability by using the CLI command to bypass the task group&ndash;based checks. A successful exploit could allow the attacker to elevate privileges and perform actions on an affected device without authorization checks.

## Affected

- `ios_xr < 25.2.2`

## Remediation

Upgrade past the affected range:

- `ios_xr 25.2.2`