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CVE-2021-1382: Cisco IOS XE SD-WAN Software Command Injection Vulnerability

• Severity: medium (CVSS 6.7 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.7% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-03-24 · updated 2026-06-17
• Weakness: CWE-77

Description

A vulnerability in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to inject arbitrary commands to be executed with root privileges on the underlying operating system. This vulnerability is due to insufficient input validation on certain CLI commands. An attacker could exploit this vulnerability by authenticating to the device and submitting crafted input to the CLI. The attacker must be authenticated as an administrative user to execute the affected commands. A successful exploit could allow the attacker to execute commands with root privileges.

Affected products

• Cisco IOS XE: before 17.3.3; from 17.4.1 through 17.4.2; from 17.5.0 before 17.5.1a; from 17.6.0 before 17.6.1a — fixed in 17.3.3, 17.5.1a, 17.6.1a

How to fix

Upgrade to a fixed version: Cisco IOS XE 17.3.3, 17.5.1a, 17.6.1a. Check the vendor advisory for mitigations.

References

• https://github.com/orangecertcc/security-research/security/advisories/GHSA-7xfm-92p7-qc57
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xesdwcinj-t68PPW7m
• https://github.com/orangecertcc/security-research/security/advisories/GHSA-7xfm-92p7-qc57
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-xesdwcinj-t68PPW7m

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