CVE-2026-20321CWE-544

CVE-2026-20321

Medium · published October 7, 2026

CVSS v3.1
6.5
EPSS
0%
Percentile
36.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
6.5 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
CVSS v4.0
Not supplied
EPSS
0.00434 · 36.7th percentile
Weakness
CWE-544 · Missing Standardized Error Handling Mechanism
Published
2026-10-07T21:16Z
References (1)
EPSS history
Timeline
  • 09 OCT 03:27Z
    EPSS moved — → 0%
    epss
  • 07 OCT 16:11Z
    Cisco Application Policy Infrastructure Controller API Command Injection Vulnerability
    cvelistv5