VULNERABILITY INTELLIGENCE

CVE-2021-1592

CVSS score4.3 MEDIUM
EPSS probability1.03%
CISA KEVNot currently listed
Published2021-08-25
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Description

A vulnerability in the way Cisco UCS Manager software handles SSH sessions could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. This vulnerability is due to improper resource management for established SSH sessions. An attacker could exploit this vulnerability by opening a significant number of SSH sessions on an affected device. A successful exploit could allow the attacker to cause a crash and restart of internal Cisco UCS Manager software processes and a temporary loss of access to the Cisco UCS Manager CLI and web UI. Note: The attacker must have valid user credentials to authenticate to the affected device.

Weakness classification

  • CWE-664: Improper Control of a Resource Through its Lifetime
  • CWE-770: Allocation of Resources Without Limits or Throttling

Primary references