CVE-2025-20337

Cisco Identity Services Engine: Injection

As of , CVE-2025-20337 in Cisco Identity Services Engine is on CISA's list of exploited vulnerabilities: CISA listed it on . Our patch-first group: Patch this week.

Exploited
Yes: CISA listed it on 28 July 2025
US federal deadline
18 August 202521 days after CISA listed it. US federal civilian agencies must fix it by then.
Used in ransomware campaigns
Not known to CISA
EPSS score
0.68Higher than 99% of the CVEs EPSS scores. EPSS estimates the chance of exploitation activity in the next 30 days.
Public exploit
None foundNeither Metasploit nor Exploit-DB lists one.
Fix
Vendor advice: sec.cloudapps.cisco.comLinks below, from CISA's entry.

What CISA says 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's required action

What the flaw is

Cisco Identity Services Engine contains an injection vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC due to insufficient validation of user-supplied input allowing an attacker to exploit this vulnerability by submitting a crafted API request. Successful exploitation could allow an attacker to perform remote code execution and obtaining root privileges on an affected device.

CISA's 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.

The CVE record's description, from cisco

CVE published
16 July 2025
Assigned by
cisco
CVSS
10.0 Critical (CVSS 3.1, from the CNA)
CWE-74
Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CISA SSVC, exploitation
active
CISA SSVC, automatable
yes
CISA SSVC, technical impact
total

Timeline

  1. The CVE record was published.
  2. CISA added it to its list of exploited vulnerabilities.
  3. The US federal deadline to fix it.

Identity Services Engine: other exploited entries

VulnerabilityProductOur groupListedDeadlineEPSS
CVE-2026-76460Incorrect Use of Privileged APIsCisco Identity Services EnginePatch nowForensic triage required by CISA0.14
CVE-2025-20281InjectionCisco Identity Services EnginePatch this weekEPSS 0.980.98

Read further