Medium6.5Cisco

Medium [CVE-2026-20036] Cisco UCS Manager Software Command Injection Vulnerability

This medium-severity Cisco advisory covers CVE-2026-20036 affecting Cisco Unified Computing System (Managed), NX-OS, UCS.

cisco-sa-ucsm-cmdinj-GvxLPeSB Published Feb 25, 2026Updated by vendor Feb 25, 2026

CVE-2026-20036

Affected products & platforms

CiscoSwitchesNexusNX-OS

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Summary

A vulnerability in the CLI and web-based management interface of Cisco UCS Manager Software could allow an authenticated, remote attacker with valid administrative privileges to execute arbitrary commands on the underlying operating system of an affected device.

This vulnerability is due to insufficient input validation of command arguments that are supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command.

Affected products named by the advisory: Cisco Unified Computing System (Managed); NX-OS.

Affected versions

Scope: At the time of publication, this vulnerability affected the following Cisco products if they were running a vulnerable release of Cisco UCS Manager Software, regardless of device configuration:
4.1 and earlier — Migrate to a fixed release
4.2 — Migrate to a fixed release
Release 4.3 (first fixed: 4.3(6f))
Release 6.0 (first fixed: 6.0(2) (Mar 2026))

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions

4.3(6f)
6.0(2) (Mar 2026)

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Mitigation checklist

Recommended fix / mitigation

Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
Release 4.1 and earlier: migrate to a fixed release.
Release 4.2: migrate to a fixed release.
Release 4.3: upgrade to 4.3(6f).
Release 6.0: upgrade to 6.0(2) (Mar 2026).

Workaround status

There are no workarounds that address this vulnerability.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Sources

Official and corroborating records used to build this advisory.

Cisco Security Advisories (PSIRT)official
Official vendor feed — the source of truth for this advisory. VulniPulse polled this feed and parsed this entry from it. Discovered from the machine-readable feed https://sec.cloudapps.cisco.com/security/center/psirtrss20/CiscoSecurityAdvisory.xml; this link opens the Cisco advisory index instead of the raw feed document.
Cisco
Vendor advisory pageofficial
Advisory page fetched and parsed to extract affected/fixed versions and mitigation guidance beyond what the feed carries.
Cisco

Cross-references

Validate CVE metadata against the authoritative registries.

CVE-2026-20036NVD CVE.org MITRE

Official resources

Cisco Nexus (NX-OS) upgrade guide (target: 4.3 / 6.0)
Official documentation
This advisory names 4.3 / 6.0 as the first fixed releases — official upgrade documentation for Cisco Nexus switches running NX-OS.
Cisco Software Checker
Official documentation
Official tool to confirm whether your exact IOS / IOS XE / NX-OS / ASA / FTD / SD-WAN release is affected and to find the first fixed release.

Discussion(0)

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