CVE-2025-20337
Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
Cisco Identity Services Engine Injection Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
CISA notes
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-rce-ZAd2GnJ6 ; https://nvd.nist.gov/vuln/detail/CVE-2025-20337
Description
A vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker to execute arbitrary code on the underlying operating system as root. The attacker does not require any valid credentials to exploit this vulnerability. This vulnerability is due to insufficient validation of user-supplied input. An attacker could exploit this vulnerability by submitting a crafted API request. A successful exploit could allow the attacker to obtain root privileges on an affected device.
Severity
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:HExploitation Context
as of October 14, 2026- CISA added CVE-2025-20337 to the KEV catalog 12 days after its CVE record was published. The median for entries added in 2025 is 26 days.
- It is one of 100 Cisco entries in the CISA KEV catalog, and one of 8 added in 2025.
- Its current EPSS score (68.0%) is higher than that of 57% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Cisco Cisco Identity Services Engine Software | 3.3.0 3.3 Patch 2 3.3 Patch 1 3.3 Patch 3 3.4.0 3.3 Patch 4 3.4 Patch 1 3.3 Patch 5 3.3 Patch 6 |
| Cisco | Cisco Cisco ISE Passive Identity Connector | 3.2.0 3.1.0 3.3.0 3.4.0 |
References
1 LinksRecord Details
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CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.