Cisco Application Policy Infrastructure Controller API Command Injection Vulnerability

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-20321
StatePUBLISHED
Assignercisco
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-07 17:16:55 UTC
Updated2026-10-07 17:16:55 UTC
DescriptionA 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.

Risk And Classification

Primary CVSS: v3.1 6.5 MEDIUM from [email protected]

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

Problem Types: CWE-544 | CWE-544 Missing Standardized Error Handling Mechanism

VersionSourceTypeScoreSeverityVector
3.1[email protected]Primary6.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
3.1CNACVSSV3_16.5MEDIUMCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
High
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None

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

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 5.3(1d) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 5.3(2a) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 5.3(2b) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 5.3(2c) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 5.3(2d) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 5.3(2e) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 5.3(2f) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 6.1(5e) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 6.2(1f) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 6.2(1g) Not specified
CNA Cisco Cisco Application Policy Infrastructure Controller APIC affected 6.2(2e) Not specified

References

ReferenceSourceLinkTags
sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-c... [email protected] sec.cloudapps.cisco.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Additional Advisory Data

Exploits

CNA: The Cisco PSIRT is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.

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