CVE-2021-1388
10.0
CRITICAL · CVSS 3.1 · EPSS 14.8% (pctl 97)
Patch early
EPSS 14.8% — above the 10% action threshold.
Description
A vulnerability in an API endpoint of Cisco ACI Multi-Site Orchestrator (MSO) installed on the Application Services Engine could allow an unauthenticated, remote attacker to bypass authentication on an affected device. The vulnerability is due to improper token validation on a specific API endpoint. An attacker could exploit this vulnerability by sending a crafted request to the affected API. A successful exploit could allow the attacker to receive a token with administrator-level privileges that could be used to authenticate to the API on affected MSO and managed Cisco Application Policy Infrastructure Controller (APIC) devices.
Scoring
| CVSS | 10.0 (CRITICAL, v3.1) |
|---|---|
| Vector | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H |
| EPSS | 14.85% — more likely to be exploited than 97% of all CVEs |
| Weakness | CWE-269 |
| On CISA KEV | no |
| Public exploit | none known |
| Published | 2021-02-24 |
| Last modified | 2026-06-17 |
Affected (2)
| Vendor | Product |
|---|---|
| cisco | aci multi-site orchestrator |
| cisco | application policy infrastructure controller |
References
→ the Explorer · watch your stack · NVD