CVE-2025-20281KEV · OVERDUECWE-74

Cisco ISE API Unauthenticated Remote Code Execution Vulnerability

Critical · published June 25, 2025

Patch now

Confirmed exploited, and the score agrees

CVSS calls it critical at 10.0. It is confirmed in active exploitation. It sits in the 99.9th percentile for exploit probability.

432
days past CISA
deadline
CVSS v3.1
10.0
EPSS
98%
Percentile
99.9
In the wild
Confirmed
What it is

🚨 A crafted API request is all it takes to let attackers waltz right into your system with root access! 🔥 Think of this as leaving a key under the doormat for anyone to find, except this key opens the entire house! It’s like an invitation for an uninvited guest to rearrange your furniture, delete your files, and essentially take over your life. If exploited, an attacker could gain complete control over your device, leading to anything from data theft to total system compromise. This isn't just a minor inconvenience; it's absolutely devastating and could affect your entire network, putting sensitive data at serious risk!

Put simply

Think of this as leaving a key under the doormat for anyone to find, except this key opens the entire house! It’s like an invitation for an uninvited guest to rearrange your furniture, delete your files, and essentially take over your life. This vulnerability stems from insufficient validation of user-supplied input in specific APIs of Cisco ISE and Cisco ISE-PIC, allowing unauthenticated attackers to execute arbitrary code with root privileges by submitting a specially crafted API request.

What to do

If exploited, an attacker could gain complete control over your device, leading to anything from data theft to total system compromise. This isn't just a minor inconvenience; it's absolutely devastating and could affect your entire network, putting sensitive data at serious risk! Immediately patch your Cisco ISE and Cisco ISE-PIC systems to the latest version provided by Cisco to close this critical vulnerability. Additionally, review your API access control policies to minimize exposure and ensure that only authorized requests are processed. 🛡️ You've got this! By taking these steps, you can secure your systems and keep those uninvited guests out. 🦸‍♂️

The record
Technical detail
CVSS v3.1
10.0 · CRITICAL
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.97601 · 99.9th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2025-06-25T16:11Z
KEV added
2025-07-28 · due 2025-08-18
EPSS history
Timeline
  • 28 JUL 00:00Z
    Added to CISA KEV — remediate by Aug 18
    kev
  • 25 JUN 16:11Z
    Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
    cvelistv5