CVE-2026-20321: cisco cisco application policy infrastructure controller (apic)
Vulnerability summary
CVE-2026-20321 is a medium (CVSS 6.5) vulnerability in cisco cisco application policy infrastructure controller (apic). EPSS estimates a 0.43% chance of exploitation in the next 30 days, higher than 36.4% of scored vulnerabilities.
Timeline
- 07-10-2026PublishedVulnerability first disclosed.
- 08-10-2026Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 2 sources · 1 version- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N
EPSS trend
Probability
0.43%
Chance of exploitation in the next 30 days
Percentile
36%
Versus all other CVEs
30-day change
Change unavailable
Change unavailable
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Cisco1 product
- 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)
1 vendor · 1 product