Vulnerability Database

314,342

Total vulnerabilities in the database

CVE-2021-34721

Multiple vulnerabilities in the CLI of Cisco IOS XR Software could allow an authenticated, local attacker to gain access to the underlying root shell of an affected device and execute arbitrary commands with root privileges. For more information about these vulnerabilities, see the Details section of this advisory.

  • Published: Sep 9, 2021
  • Updated: Nov 16, 2025
  • CVE: CVE-2021-34721
  • Severity: Medium
  • Exploit:

CVSS v3:

  • Severity: Medium
  • Score: 6.7
  • AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

CVSS v2:

  • Severity: Medium
  • Score: 6.9
  • AV:L/AC:M/Au:N/C:C/I:C/A:C

CWEs:

OWASP TOP 10:

Software From Fixed in
cisco / ios_xr - 7.3.2
cisco / ios_xr 7.4.0 7.4.1.x
cisco / ios_xr 7.4.0 7.4.1