CVE-2020-3473

Cisco IOS XR Software Authenticated User Privilege Escalation Vulnerability

HIGH

7.8

CVSS Score

Published: September 4, 2020 at 02:26 AM UTC

Updated: June 17, 2026 at 03:18 AM UTC

19 products affected across 1 vendorIOS Xr82018202

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Severity

HIGH7.8

Exploit prediction

EPSS 0.4%

SSVC

No known exploit

Description

A vulnerability in task group assignment for a specific CLI command in Cisco IOS XR Software could allow an authenticated, local CLI shell user to elevate privileges and gain full administrative control of the device. The vulnerability is due to incorrect mapping of a command to task groups within the source code. An attacker could exploit this vulnerability by first authenticating to the local CLI shell on the device and 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 the device without authorization checks.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

IOS Xr · Cisco

95%

5.0.0 ≤ v < 6.5.295.0.0 ≤ v < 6.6.35.0.0 ≤ v < 7.0.127.0.0 ≤ v < 7.0.27.1.0 ≤ v < 7.1.17.1.0 ≤ v < 7.2.1

Affected range stops below 6.5.29, so it looks safe — our inference, not a vendor statement

Affected range stops below 6.6.3, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.0.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.1.1, so it looks safe — our inference, not a vendor statement

Affected range stops below 7.2.1, so it looks safe — our inference, not a vendor statement

cisco-8201 (environment) · cisco-8202 (environment) · cisco-8808 (environment) · cisco-8812 (environment) · cisco-8818 (environment) · cisco-ncs-4009 (environment) · cisco-ncs-4016 (environment) · cisco-ncs-540 (environment) · cisco-ncs-5501 (environment) · cisco-ncs-5501-se (environment) · cisco-ncs-5502 (environment) · cisco-ncs-5502-se (environment) · cisco-ncs-5508 (environment) · cisco-ncs-5516 (environment) · cisco-ncs-560 (environment) · cisco-ncs-6000 (environment) · cisco-ncs-6008 (environment) · cisco-ios-xrv-9000 (same device)

8201 · Ciscodevice

80%

All versions

8202 · Ciscodevice

80%

All versions

8808 · Ciscodevice

80%

All versions

8812 · Ciscodevice

80%

All versions