---
id: CVE-2026-20284
title: "A vulnerability in the SXP REST API of Cisco ISE could allow an authenticated, remote attacker to conduct SQL injection attacks.\r\n\r\nThis vulnerability is due to insufficient validation of user-supplied input in REST API calls"
summary: "A vulnerability in the SXP REST API of Cisco ISE could allow an authenticated, remote attacker to conduct SQL injection attacks.\r\n\r\nThis vulnerability is due to insufficient validation of user-supplied input in REST API calls. An attacke…"
severity: critical
cvss: 9.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H'
cwe:
  - CWE-943
vendor: Cisco
product: Cisco Identity Services Engine Software
affected:
  - identity_services_engine_software 3.1.0
  - identity_services_engine_software 3.1.0 p1
  - identity_services_engine_software 3.1.0 p3
  - identity_services_engine_software 3.1.0 p2
  - identity_services_engine_software 3.2.0
  - identity_services_engine_software 3.1.0 p4
  - identity_services_engine_software 3.1.0 p5
  - identity_services_engine_software 3.2.0 p1
  - identity_services_engine_software 3.1.0 p6
  - identity_services_engine_software 3.2.0 p2
  - identity_services_engine_software 3.1.0 p7
  - identity_services_engine_software 3.3.0
  - identity_services_engine_software 3.2.0 p3
  - identity_services_engine_software 3.2.0 p4
  - identity_services_engine_software 3.1.0 p8
  - identity_services_engine_software 3.2.0 p5
  - identity_services_engine_software 3.2.0 p6
  - identity_services_engine_software 3.1.0 p9
  - identity_services_engine_software 3.3 Patch 2
  - identity_services_engine_software 3.3 Patch 1
  - identity_services_engine_software 3.3 Patch 3
  - identity_services_engine_software 3.4.0
  - identity_services_engine_software 3.2.0 p7
  - identity_services_engine_software 3.3 Patch 4
  - identity_services_engine_software 3.4 Patch 1
  - identity_services_engine_software 3.1.0 p10
  - identity_services_engine_software 3.3 Patch 5
  - identity_services_engine_software 3.3 Patch 6
  - identity_services_engine_software 3.4 Patch 2
  - identity_services_engine_software 3.3 Patch 7
  - identity_services_engine_software 3.4 Patch 3
  - identity_services_engine_software 3.5.0
  - identity_services_engine_software 3.4 Patch 4
  - identity_services_engine_software 3.3 Patch 8
  - identity_services_engine_software 3.2 Patch 8
  - identity_services_engine_software 3.5 Patch 1
  - identity_services_engine_software 3.3 Patch 9
  - identity_services_engine_software 3.2 Patch 9
  - identity_services_engine_software 3.4 Patch 5
  - identity_services_engine_software 3.5 Patch 3
  - identity_services_engine_software 3.5 Patch 2
  - identity_services_engine_software 3.3 Patch 10
  - identity_services_engine_software 3.3 Patch 11
  - identity_services_engine_software 3.4 Patch 6
  - identity_services_engine_software 3.2 Patch 10
  - identity_services_engine_software 3.1.0 p72
  - identity_services_engine_software 3.1.0 p11
published: '2026-09-16'
updated: '2026-09-18'
sourceUpdated: '2026-09-18T13:28:28.567'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-20284'
references:
  - url: >-
      https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-mult-vul-ymSsTLCc
    label: psirt@cisco.com
  - url: 'https://software.cisco.com'
tags:
  - nvd
  - cve.org
  - in-the-wild
  - exploit-available
  - csaf
  - vendor-advisory
  - cisco
epss: 0.00391
epssPercentile: 0.30413
exploited: true
exploitAvailable: true
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: total
  timestamp: '2026-09-17T15:41:40.502101Z'
ingestedAt: '2026-09-16T16:37:52.199Z'
---

## Overview

A vulnerability in the SXP REST API of Cisco ISE could allow an authenticated, remote attacker to conduct SQL injection attacks.

This vulnerability is due to insufficient validation of user-supplied input in REST API calls. An attacker could exploit this vulnerability by sending crafted input to an affected device. A successful exploit could allow the attacker to view or modify data on the underlying database for the affected device. In single-node deployments, successful exploitation of this vulnerability could cause the affected ISE node to become unavailable, resulting in a DoS condition. In that condition, endpoints that have not already authenticated would be unable to access the network until the node is restored.
To exploit this vulnerability, the attacker must have valid administrative credentials, have the SXP service enabled, and have at least one SXP connection configured.

## Remediation

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

## Vendor advisories

- **cisco-sa-ise-mult-vul-ymSsTLCc** · Cisco · affected: Cisco Identity Services Engine Software (46 versions) · updated 2026-09-16 · [advisory](https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-mult-vul-ymSsTLCc)