CVE-2026-20321

MEDIUM 6.5

Cisco Application Policy Infrastructure Controller API Command Injection Vulnerability

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

A vulnerability in the web-based management API for Cisco Application Policy Infrastructure Controller (APIC) could allow an authenticated, remote attacker to execute arbitrary commands as the root user. To exploit this vulnerability, the attacker must have valid administrative credentials. This vulnerability is due to insufficient input validation of user-controlled command arguments. An attacker could exploit this vulnerability by authenticating using the API and sending crafted input. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system of an affected device with root-level privileges.

CWE	CWE-544
Vendor	cisco
Product	cisco application policy infrastructure controller (apic)
Ecosystems	Networking
Industries	NetworkingTelecommunications
Published	Oct 7, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

None

Affected Versions

Cisco / Cisco Application Policy Infrastructure Controller (APIC)

5.3(1d) 5.3(2a) 5.3(2b) 5.3(2c) 5.3(2d) 5.3(2e) 5.3(2f) 6.1(5e) 6.2(1f) 6.2(1g) 6.2(2e)

References

NVD ↗ CVE.org ↗ EPSS Data ↗

sec.cloudapps.cisco.com: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-cmdinj-L6VR4E7