What is the CVSS score of CVE-2026-20099?

CVE-2026-20099 has a CVSS 3.1 base score of 6.7 (Medium). CVSS vector: CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. EPSS exploitation probability: 0.1%.

Which versions of Cisco are affected by CVE-2026-20099?

CVE-2026-20099 presents notable security risk, a OS command injection vulnerability rated CVSS 6.7. Exploitation could allow attackers to execute code or inject malicious input.

How to fix or mitigate CVE-2026-20099?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Validate input sanitization for user-controlled parameters.

Cisco CVE-2026-20099

MEDIUM

OS Command Injection (CWE-78)

2026-02-25 psirt@cisco.com

Cisco Command Injection

6.7

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.7 MEDIUM

AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Local

Attack Complexity

Low

Privileges Required

High

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:55 vuln.today

CVE Published

Feb 25, 2026 - 17:25 nvd

MEDIUM 6.7

DescriptionCVE.org

A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, local attacker with administrative privileges to perform command injection attacks on an affected system and elevate privileges to root. 

This vulnerability is due to insufficient input validation of command arguments supplied by the user. An attacker could exploit this vulnerability by authenticating to a device and submitting crafted input to the affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying operating system of the affected device with root-level privileges.

AnalysisAI

Insufficient input validation in Cisco FXOS and UCS Manager web interfaces enables authenticated administrators to inject arbitrary commands and achieve root-level code execution on affected systems. The vulnerability requires local access and valid admin credentials, allowing privileged attackers to bypass normal OS restrictions. No patch is currently available, and the lack of input sanitization on command arguments represents a critical privilege escalation vector for insider threats.

Technical ContextAI

Classified as CWE-78 (OS Command Injection). A vulnerability in the web-based management interface of Cisco FXOS Software and Cisco UCS Manager Software could allow an authenticated, local attacker with administrative privileges to perform command injection attacks on an affected system and elevate privileges to root. 