What’s Vulnerable › Vulnerabilities

CVE-2020-3353: Cisco Identity Services Engine Denial of Service Vulnerability

• Severity: medium (CVSS 5.9 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2020-06-03 · updated 2026-06-17
• Weakness: CWE-362

Description

A vulnerability in the syslog processing engine of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to a race condition that may occur when syslog messages are processed. An attacker could exploit this vulnerability by sending a high rate of syslog messages to an affected device. A successful exploit could allow the attacker to cause the Application Server process to crash, resulting in a DoS condition.

Affected products

• Cisco Identity Services Engine: 2.2.0.470, 2.2.0.470-patch1, 2.2.0.470-patch10, 2.2.0.470-patch11, 2.2.0.470-patch12, 2.2.0.470-patch2 (+15)

References

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-dos-qNzq39K7
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-dos-qNzq39K7

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