Answer in brief
CVE-2026-20321 records a Medium severity (CVSS 6.5) vulnerability in Cisco Application Policy Infrastructure Controller API Command Injection Vulnerability. The current sources do not mark it as known exploited. The current feed maps Cisco/Cisco Application Policy Infrastructure Controller (APIC) (generic). Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 6.5. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps Cisco/Cisco Application Policy Infrastructure Controller (APIC) (generic). Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| Cisco/Cisco Application Policy Infrastructure Controller (APIC)generic | 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) | Not reported |
Published upstream
Oct 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Oct 7, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Oct 7, 2026
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.
Quoted source text, attributed separately from HOL analysis.