CVE-2026-20284
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AI Threat Summary
CVE-2026-20284 is a critical vulnerability with a CVSS score of 9.1 affecting the target software. This vulnerability allows SQL injection leading to unauthorized data access. Threat hunters should monitor for exploit attempts and apply vendor patches immediately.
Description
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.
Attack Chain
Attacker fingerprints web application and identifies injectable parameters using automated scanners
Attacker injects SQL payload via vulnerable parameter to bypass authentication or extract data
Attacker dumps database tables including user credentials, session tokens, and sensitive data
Extracted password hashes cracked offline using hashcat/john or plain-text credentials used directly
Valid credentials reused across other systems and services in the environment
MITRE ATT&CK Techniques
SQL injection exploited against web application database layer
Database contents exfiltrated including credentials and PII
Credentials stolen from database used for further access
Indicators of Compromise
| Type | Value | Description | |
|---|---|---|---|
| user_agent | Mozilla/5.0 (compatible; exploit/1.0) |
Generic exploit scanner user agent pattern | |
| url | /api/vuln-endpoint?payload=<malicious> |
Exploit attempt against application endpoint — monitor access logs for anomalous params | |
| url | ' OR 1=1-- |
Classic SQL injection payload — monitor WAF and DB query logs |
Remediation
Quick Facts
| CVE ID | CVE-2026-20284 |
| CVSS Score | 9.1 |
| Vector | CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |
| Published | 2026-09-16 |
| Exploited | No |
| CISA KEV | No |
| PoC | Available |