VYPR
Unrated severityNVD Advisory· Published Mar 24, 2021· Updated Nov 8, 2024

Cisco IOS XE SD-WAN Software Parameter Injection Vulnerabilities

CVE-2021-1454

Description

Multiple vulnerabilities in the CLI of Cisco IOS XE SD-WAN Software could allow an authenticated, local attacker to access the underlying operating system with root privileges. These vulnerabilities are due to insufficient input validation of certain CLI commands. An attacker could exploit these vulnerabilities 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 access the underlying operating system with root privileges.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Authenticated local attackers can inject OS commands with root privileges via insufficiently validated CLI input in Cisco IOS XE SD-WAN Software.

Vulnerability

Multiple vulnerabilities in the CLI of Cisco IOS XE SD-WAN Software allow an authenticated, local attacker to access the underlying operating system with root privileges. These weaknesses stem from insufficient input validation of certain CLI commands [1]. Affected versions include various releases of Cisco IOS XE SD-WAN Software; customers should consult the Cisco Software Checker to determine specific exposure [1].

Exploitation

An attacker must authenticate to the device as an administrative user to execute the affected commands. By submitting specially crafted input to the CLI, the attacker can exploit the improper validation to achieve command injection [1].

Impact

Successful exploitation grants the attacker root-level access to the underlying operating system, resulting in full compromise of the device's confidentiality, integrity, and availability [1].

Mitigation

Cisco has released software updates to address these vulnerabilities. Customers are advised to upgrade to the fixed versions indicated by the Cisco Software Checker tool for their respective releases [1]. No workarounds are available in the advisory.

AI Insight generated on May 26, 2026. Synthesized from this CVE's description and the cited reference URLs; citations are validated against the source bundle.

Affected products

2

Patches

0

No patches discovered yet.

Vulnerability mechanics

AI mechanics synthesis has not run for this CVE yet.

References

1

News mentions

0

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