Is CVE-2026-23339 known to be exploited?

It is not marked known-exploited in this record.

CVE-2026-23339

Cisco security advisories have been released for the five CVEs. Affected users should identify their NX-OS version and apply the relevant patches or software updates as specified in the advisories. It is recommended to monitor Cisco's security portal for updates and follow best practices for network device hardening, including restricting management access and applying the principle of least privilege.

Quick answers

What is CVE-2026-23339?: Cisco security advisories have been released for the five CVEs. Affected users should identify their NX-OS version and apply the relevant patches or software updates as specified in the advisories. It is recommended to monitor Cisco's security portal for updates and follow best practices for network device hardening, including restricting management access and applying the principle of least privilege.
How severe is CVE-2026-23339?: critical
Is CVE-2026-23339 known to be exploited?: It is not marked known-exploited in this record.
How should CVE-2026-23339 be mitigated?: Cisco security advisories have been released for the five CVEs. Affected users should identify their NX-OS version and apply the relevant patches or software updates as specified in the advisories. It is recommended to monitor Cisco's security portal for updates and follow best practices for network device hardening, including restricting management access and applying the principle of least privilege.

CVSS

—

Vendor

Cisco

Published

Oct 9, 2026 · 03:59

Patch

Unknown / not confirmed

Affected products

NX-OS, Nexus switches

Mitigation

Cisco Advisories Five Critical Vulnerabilities in NX-OS Nexus Switches

Cisco has released security advisories addressing five critical vulnerabilities in the NX-OS operating system used by Nexus data center switches. The flaws could be exploited to execute arbitrary code with root privileges, potentially leading to full device compromise and lateral movement within data center environments.

11m

CVE-2026-23339

Quick answers

Related News

Cisco Advisories Five Critical Vulnerabilities in NX-OS Nexus Switches