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Vulnerability details

CVE-2025-20281

Actively exploited
Cisco Identity Services Engine Software

Cisco ISE API Unauthenticated Remote Code Execution Vulnerability

CVSS 3.1
10.0Critical

Remedy

Required action (CISA): Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. (due: 2025-08-18)

Official 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 scores

ScoreVersionSourceVector
10.0Critical 3.1 CVEProject cvelistV5 (CNA) (cisco) CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

VendorProductVersionsSource
Cisco Cisco Identity Services Engine Software 3.3 Patch 1 CVEProject cvelistV5 (CNA)
Cisco Cisco Identity Services Engine Software 3.3 Patch 2 CVEProject cvelistV5 (CNA)
Cisco Cisco Identity Services Engine Software 3.3 Patch 3 CVEProject cvelistV5 (CNA)
Cisco Cisco Identity Services Engine Software 3.3 Patch 4 CVEProject cvelistV5 (CNA)
Cisco Cisco Identity Services Engine Software 3.3 Patch 5 CVEProject cvelistV5 (CNA)
Cisco Cisco Identity Services Engine Software 3.3 Patch 6 CVEProject cvelistV5 (CNA)
Cisco Cisco Identity Services Engine Software 3.3.0 CVEProject cvelistV5 (CNA)
Cisco Cisco Identity Services Engine Software 3.4 Patch 1 CVEProject cvelistV5 (CNA)
Cisco Cisco Identity Services Engine Software 3.4.0 CVEProject cvelistV5 (CNA)

References and advisories

3
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Details

Published
2025-06-25
Last updated
2026-02-26
State
Published
Assigner (CNA)
cisco
Kolun priority
100 · Critical

CISA KEV catalog

Date added
2025-07-28
Due date
2025-08-18
Used in ransomware
Unknown

Exploit prediction (EPSS)

97.6%
Probability of exploitation in 30 days
99.9%
Percentile (among all CVEs)

SSVC assessment (CISA)

Automatable
Yes
Exploitation
Active
Technical impact
Total

Weaknesses (CWE)

  • CWE-74
    Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')