What is CVE-2022-20921?

CVE-2022-20921 is a high-severity vulnerability in Cisco Aci Multi-Site Orchestrator, classified under Improper Authorization. CVSS score: 8.8/10. Published 2022-08-25.

How severe is CVE-2022-20921?

High severity. CVSS v3 base score is 8.8 out of 10.

Auth bypass in Cisco Aci Multi-Site Orchestrator

CVE-2022-20921

A vulnerability in the API implementation of Cisco ACI Multi-Site Orchestrator (MSO) could allow an authenticated, remote attacker to elevate privileges on an affected device. This vulnerability is due to improper authorization on specific APIs. An attacker could exploit this vulnerability by sending crafted HTTP requests. A successful exploit could allow an attacker who is authenticated with non-Administrator privileges to elevate to Administrator privileges on an affected device.

Published 2022-08-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.5th percentile), scored 2026-10-01.

Low probability of exploitation in the next 30 days, but still tracked. 67th percentile — 66.5% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: +0.000

Affected products

Weakness classification (CWE)

CWE-285 — Improper Authorization

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-mso-prve… (vendor-advisory, Vendor Advisory)

Frequently asked questions

What is CVE-2022-20921?: CVE-2022-20921 is a high-severity vulnerability in Cisco Aci Multi-Site Orchestrator, classified under Improper Authorization. CVSS score: 8.8/10. Published 2022-08-25.
How severe is CVE-2022-20921?: High severity. CVSS v3 base score is 8.8 out of 10.