CVE-2025-20337
Cisco Identity Services Engine Injection Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 18 August 2025). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 10.0 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- EPSS
- 74.50% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 28 July 2025 · due 18 August 2025
- Weakness
- CWE-74
- Affected
- cisco/identity services engine · cisco/identity services engine passive identity connector
- Source
- psirt@cisco.com
EPSS moved from 74.5% on 17 October 2026 to 74.5% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-rce-ZAd2GnJ6 ; https://nvd.nist.gov/vuln/detail/CVE-2025-20337
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.