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CVE-2026-20046— Cisco IOS XR Software CLI Privilege Escalation Vulnerability

Quick assessment

Affected
Cisco Cisco IOS XR Software
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR存在权限许可和访问控制问题漏洞，该漏洞源于源代码中命令到任务组的映射错误，可能导致权限提升和未经授权的操作。

CVSS 8.8 · High EPSS 0.14% · P2

Possible ATT&CK Techniques 1 AI

T1068 · Exploitation for Privilege Escalation
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I. Basic Information for CVE-2026-20046

Vulnerability Information
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Vulnerability Title
Cisco IOS XR Software CLI Privilege Escalation Vulnerability
Source: CVE Program / CVE List V5
Vulnerability Description
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–based checks. A successful exploit could allow the attacker to elevate privileges and perform actions on an affected device without authorization checks.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
权限、特权和访问控制
Source: CVE Program / CVE List V5
Vulnerability Title
Cisco IOS XR 权限许可和访问控制问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cisco IOS XR是美国思科（Cisco）公司的一套为其网络设备开发的操作系统。 Cisco IOS XR存在权限许可和访问控制问题漏洞，该漏洞源于源代码中命令到任务组的映射错误，可能导致权限提升和未经授权的操作。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cisco Cisco IOS XR Software 6.6.1 -

II. Public POCs for CVE-2026-20046

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III. Intelligence Information for CVE-2026-20046

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Vendor Advisories for CVE-2026-20046 (1)

Same Patch Batch · Cisco · 2026-03-11 · 6 CVEs total

CVE-2026-20040 8.8 HIGH Cisco IOS XR Software CLI Privilege Escalation Vulnerability
CVE-2026-20074 7.4 HIGH Cisco IOS XR Software Multi-Instance Intermediate System-to-Intermediate System Denial of
CVE-2026-20118 6.8 MEDIUM Cisco IOS-XR NCS 5500 and NCS 5700 Egress Packet Network Interfaces Aligner Interrupt Deni
CVE-2026-20116 6.1 MEDIUM Multiple Cisco Contact Center Products Cross-Site Scripting Vulnerabilities
CVE-2026-20117 6.1 MEDIUM Multiple Cisco Contact Center Products Cross-Site Scripting Vulnerabilities

IV. Related Vulnerabilities

Same product: Cisco IOS XR Software
Same vendor: Cisco
Same weakness: CWE-264

V. Comments for CVE-2026-20046

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