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CVE-2025-20337

Cisco ISE API Unauthenticated Remote Code Execution Vulnerability

  • Critical 10.0
  • Exploited: added to CISA KEV 28 Jul 2025

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.

Key facts

Published
16 Jul 2025
Last changed
26 Feb 2026
Assigned by
cisco
KEV added
28 Jul 2025
KEV fix due
18 Aug 2025
EPSS
74.499% likely to be exploited in the next 30 days, higher than 99.503% of CVEs (scores for 15 Nov 2026)
SSVC (CISA)
Exploitation: active; Automatable: yes; Technical impact: total

Severity scores

Each score is shown as its source gave it. They are not averaged or merged.

  • 10.0CVSS 3.1, Criticalfrom the CNA (cisco)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

What to do

  • 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 KEV required action

Historical context and remediation

This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.

No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.

Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.

Read the original CVE record.

Affected products

VendorProductVersions
CiscoCisco Identity Services Engine Software
  • Default status: unknown
  • 3.3.0 (affected)
  • 3.3 Patch 2 (affected)
  • 3.3 Patch 1 (affected)
  • 3.3 Patch 3 (affected)
  • 3.4.0 (affected)
  • 3.3 Patch 4 (affected)
  • 3.4 Patch 1 (affected)
  • 3.3 Patch 5 (affected)
  • 3.3 Patch 6 (affected)
CiscoCisco ISE Passive Identity Connector
  • Default status: unknown
  • 3.2.0 (affected)
  • 3.1.0 (affected)
  • 3.3.0 (affected)
  • 3.4.0 (affected)

Timeline

  1. 16 Jul 2025 Published
  2. 28 Jul 2025 CVE-2025-20337 added to CISA KEV
  3. 28 Jul 2025 Added to the CISA KEV catalogue

Weakness

References