CVE-2022-20821
Cisco IOS XR Open Port Vulnerability
What is affected
| Vendor | Cisco |
|---|---|
| Product | IOS XR |
| Weakness | CWE-923 |
The vulnerability
Cisco IOS XR software health check opens TCP port 6379 by default on activation. An attacker can connect to the Redis instance on the open port and allow access to the Redis instance that is running within the NOSi container.
Required action
Apply updates per vendor instructions.
US federal civilian agencies were required to act by 13 June 2022 under BOD 22-01. The deadline is a compliance date, not a measure of severity — it says nothing about how dangerous the flaw is to anyone else.
Where this comes from
Every field on this page is taken from the CISA Known Exploited Vulnerabilities catalog, last synced 12 Nov 2026, 21:26. Nothing here is our own assessment. For the technical scoring, see the NVD record below.
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