CVE-2024-20320

What it is

A vulnerability in the SSH client feature of Cisco IOS XR Software for Cisco 8000 Series Routers and Cisco Network Convergence System (NCS) 540 Series and 5700 Series Routers could allow an authenticated, local attacker to elevate privileges on an affected device. This vulnerability is due to insufficient validation of arguments that are included with the SSH client CLI command. An attacker with low-privileged access to an affected device could exploit this vulnerability by issuing a crafted SSH client command to the CLI. A successful exploit could allow the attacker to elevate privileges to root on the affected device.

At a glance

Exploitability

Can be exploited locally on the machine with a low-privilege account. High risk of data exposure, data tampering, service disruption.

Exploit odds

0.2% chance of exploitation in the next 30 days (EPSS).

Fix

A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

1. 2024-03-13 17:15 UTC PublishedDisclosed publicly on CVE.org and NVD
2. 2026-06-17 07:06 UTC Last updatedMost recent change to the record

Why it ranks here

• Exploited in the wild: no, CISA does not list it.
• Exploit odds: 0.2% in the next 30 days (EPSS).
• Severity: 7.8 HIGH (CVSS).
• Fix: a patch or advisory is linked.

Details

Published

2024-03-13 17:15 UTC

Last modified

2026-06-17 07:06 UTC

Exploit probability

0.2% · EPSS, next 30 days

Weakness

CWE-266

Record status

Analyzed

Affected

• Cisco iOS Xr 7.2.1
• Cisco iOS Xr 7.2.2
• Cisco iOS Xr 7.3.1
• Cisco iOS Xr 7.3.2
• Cisco iOS Xr 7.3.3
• Cisco iOS Xr 7.3.5
• Cisco iOS Xr 7.3.15
• Cisco iOS Xr 7.4.1

Attack profile CVSS 3.1 · 7.8

Attack vector

Local

Complexity

Low

Privileges needed

Low

User interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Is it in your code?

Hand this to your coding agent. It searches your project for the affected products and checks versions. Nothing leaves your machine.

Read https://cve-list.com/agent/cve/CVE-2024-20320.md and follow it. Check whether this project is affected by CVE-2024-20320. Read only. Don't change anything and don't upload my code. Tell me yes, no or not sure, with the file as proof.

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