CVE-2020-3353: medium-severity vulnerability in Cisco Identity Services Engine Software
Cisco Identity Services Engine Denial of Service Vulnerability
Published · Updated
E-mail alert when it lands in KEV, gets a public PoC or its score goes up.
13Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 5.9epss 0.8%
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.
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
Affected products
Cisco · Cisco Identity Services Engine SoftwareRelated CVEs — Cisco Identity Services Engine Software
In the same product, most dangerous first.
CVE-2025-20281CRITICALCisco ISE API Unauthenticated Remote Code Execution VulnerabilityEPSS 97.6%KEVCVE-2026-76460CRITICALCisco Identity Services Engine Authentication Bypass VulnerabilityEPSS 75.6%KEVCVE-2025-20337CRITICALCisco ISE API Unauthenticated Remote Code Execution VulnerabilityEPSS 74.5%KEVCVE-2025-20282CRITICALCisco ISE API Unauthenticated Remote Code Execution VulnerabilityEPSS 38.7%CVE-2022-20964MEDIUMCVE-2022-20964EPSS 30.6%CVE-2022-20966MEDIUMCVE-2022-20966EPSS 27.6%