Cisco Advance Notification for Publication of October 7, 2026, Security Advisories
cisco-sa-notice-fBn58ELx
Advisory summary
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. Cisco has released software updates that address this vulnerability.
There are no workarounds that address this vulnerability. This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-apic-cmdinj-L6VR4E7 This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of October 7, 2026, Security Advisories.
For further documentation of improvements and fixes in Cisco APIC, see Cisco Application Policy Infrastructure Controller Security Hardening Release: October 2026. Security Impact Rating: Medium CVE: CVE-2026-20321
Scope
What the vendor says is affected
The collected bulletin did not provide a separate affected-products list. Check the original bulletin before making an exposure decision.
Next step
What the vendor recommends
Cisco has released software updates that address this vulnerability.
Review the complete instructions on the vendor's siteTimeline
When this advisory changed
- Published by Cisco
The publication date reported by the vendor.
- Added to SecurityAlert
We collected the advisory from the official source.
Vulnerabilities