CVE-2022-20821
Cisco IOS XR Open Port Vulnerability
IN CISA KEV
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.
- Vendor
- Cisco
- Product
- IOS XR
- CVSS
- No score recorded (no NVD record loaded for this entry)
- CWE
- CWE-923
- Published
- Not recorded
- NVD modified
- Not recorded
CISA KEV
- Date added
- 2022-05-23
- Due date
- 2022-06-13
- Ransomware use
- Unknown
- Required action
- Apply updates per vendor instructions.
EPSS
11.5% chance of exploitation in the next 30 days (percentile 95th)
FIRST EPSS, updated 17 Oct 2026. About EPSS
CVSS is severity, EPSS is likelihood, KEV means already exploited. EPSS is a statistical probability, not a certainty: a low score does not make a bug safe, and a high one does not prove it is being exploited.
Data last updated 18 Oct 2026. Sources: NVD API 2.0, CISA KEV catalog, FIRST EPSS. Links: NVD, CISA KEV. Metadata only. ThreatWire does not host exploit code.