Cisco Identity Services Engine Injection Vulnerability
Cisco — Cisco Identity Services Engine Software
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.
10.0
65.1%
Vector breakdown
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- User interaction
- None
- Scope
- Changed
- Confidentiality
- High
- Integrity
- High
- Availability
- High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
- Published
- Jul 16, 2025
- Modified
- Feb 26, 2026
- Added to KEV
- Jul 28, 2025
- Federal patch due
- Aug 18, 2025
CISA 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.
Weakness classification
Proof-of-concept & exploitation references
Weaponization
Public repositories whose name or description references CVE-2025-20337, found via a live GitHub search at request time. These are community-sourced signals, not a verified working exploit - cross-check each one before relying on it, and treat higher star counts and recent activity as (weak) corroboration, not proof.
No public GitHub repositories referencing CVE-2025-20337 were found at last check. Absence here is not proof no exploit exists - see the references below for vendor advisories and write-ups.
References
Frequently asked questions
What is CVE-2025-20337?
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.
How severe is CVE-2025-20337?
CVE-2025-20337 has a CVSS base score of 10.0 out of 10 (CVSS 3.1).
Is CVE-2025-20337 actively exploited in the wild?
Yes. CVE-2025-20337 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added Jul 28, 2025, meaning CISA has confirmed evidence of active exploitation.
What is the EPSS score for CVE-2025-20337?
65.1% - meaning FIRST.org's EPSS model estimates a 65.1% probability this vulnerability will be exploited in the wild within 30 days (99% percentile among all scored CVEs).
What type of vulnerability is CVE-2025-20337?
CVE-2025-20337 is classified under CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')).
Cross-checked against
Impactr finds and proves whether CVE-2025-20337 - or flaws like it - are actually reachable in your own web apps and APIs, with a reproducible exploit as evidence.
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