What is CVE-2021-1590?

CVE-2021-1590 is a medium-severity vulnerability in Cisco Nx-os Software, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2021-08-25.

How severe is CVE-2021-1590?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2021-1590 known to be exploited?

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

Buffer overflow in Cisco Nx-os Software

CVE-2021-1590

A vulnerability in the implementation of the system login block-for command for Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause a login process to unexpectedly restart, causing a denial of service (DoS) condit…

Vulnerability class: Buffer Overflow

EPSS: 0.016 (72.7th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Weakness classification (CWE)

CWE-787 — Out-of-bounds Write

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-2021-1590?: CVE-2021-1590 is a medium-severity vulnerability in Cisco Nx-os Software, classified under Out-of-bounds Write. CVSS score: 5.3/10. Published 2021-08-25.
How severe is CVE-2021-1590?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2021-1590 known to be exploited?: 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.