All vulnerabilities
CVE-2022-20821

Cisco IOS XR Open Port Vulnerability

Cisco IOS XROperating systems
Open in ThreatlineRecord JSON
CVSS
6.5Medium
ExploitationExploited in the wildAdded to KEV 23 May 2022CISA KEV
Exploit odds (EPSS)11.5%Chance of exploitation activity in the next 30 days, higher than 96% of CVEs. Scored 23 Oct 2026FIRST EPSS
Fixed inNone listedNo source names a fixed version. Check the vendor advisory below
Federal deadline13 Jun 2022Remediation due date for US federal agenciesCISA KEV
CISA required actionApply updates per vendor instructions. CISA KEV

What fixes it

No source in this snapshot names a fixed version. The vendor advisories under References are the place to check.

Timeline

  1. 23 May 2022Added to CISA KEVCISA KEV
  2. 26 May 2022, 14:00 UTCPublishedCVE List

Description

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.

Text from CVE List

Affected versions 1

  • Cisco IOS XR Softwareaffected: n/aCVE List

References 3