Risk Letters

Exploited vulnerability

CVE-2022-20821

TLP:CLEAR

Cisco IOS XR Open Port 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.

Facts

  • Vendor: Cisco
  • Product: IOS XR
  • CVSS: 6.5
  • EPSS (probability of exploitation within 30 days): 11.5 %
  • On CISA's Known Exploited Vulnerabilities list since: 23 May 2022
  • First known exploitation: 23 May 2022
  • CISA's deadline for US federal agencies: 13 June 2022
  • Weakness: CWE-923
  • First seen by Risk Letters: 23 May 2022

Members see which Nordic sectors the flaw hits, and what to do about it.

Get the full brief

Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD