---
id: CVE-2025-20258
title: "A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote attacker to inject arbitrary commands into emails that are sent by the service.\r\n\r This vulnerability is due to insufficient input validation.…"
summary: "A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote attacker to inject arbitrary commands into emails that are sent by the service.\r\n\r This vulnerability is due to insufficient input validation.…"
severity: medium
cvss: 5.4
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N'
cvssSource: cna
cwe:
  - CWE-77
vendor: Cisco
product: Cisco Duo
affected:
  - duo N/A
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2025-05-22T03:55:25.280851Z'
published: '2025-05-21'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T22:02:52.663Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2025-20258'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-duo-ssp-cmd-inj-RCmYrNA
    label: cisco-sa-duo-ssp-cmd-inj-RCmYrNA
tags:
  - cve.org
epss: 0.00299
epssPercentile: 0.22759
ingestedAt: '2026-11-05T20:33:06.534Z'
---

## Overview

A vulnerability in the self-service portal of Cisco Duo could allow an unauthenticated, remote attacker to inject arbitrary commands into emails that are sent by the service.

 This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by injecting arbitrary commands into a portion of an email that is sent by the service. A successful exploit could allow the attacker to send emails that contain malicious content to unsuspecting users.

## Affected

- `duo N/A`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.