What is CVE-2021-1592?

CVE-2021-1592 is a medium-severity vulnerability in Cisco Unified Computing System (Managed), classified under CWE-664. CVSS score: 4.3/10. Published 2021-08-25.

How severe is CVE-2021-1592?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Is CVE-2021-1592 known to be exploited?

1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Resource exhaustion in Cisco Unified Computing System (Managed)

CVE-2021-1592

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.

EPSS: 0.010 (60.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L.

Affected products

Weakness classification (CWE)

Public proof-of-concept exploits

n0-traces/cve_

References

psirt@cisco.com (x_refsource_CISCO, vendor-advisory, Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2021-1592?: CVE-2021-1592 is a medium-severity vulnerability in Cisco Unified Computing System (Managed), classified under CWE-664. CVSS score: 4.3/10. Published 2021-08-25.
How severe is CVE-2021-1592?: Medium severity. CVSS v3 base score is 4.3 out of 10.
Is CVE-2021-1592 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.