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CVE-2025-20337: Cisco Identity Services Engine Injection Vulnerability

criticalknown exploitedCVE-2025-20337
Actively exploited. At least one CVE in this advisory is listed in the CISA Known Exploited Vulnerabilities catalog — exploitation has been observed in the wild. Treat remediation as urgent.
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.

CSIRTS triage

vendor: Ciscoproduct: Identity Services EngineRemote code execution
What
Cisco Identity Services Engine contains an injection vulnerability that allows remote code execution due to insufficient validation of user-supplied input.
Who is affected
Deployments of Cisco Identity Services Engine and Cisco ISE-PIC that are running affected versions.
Urgency
Immediate remediation is necessary as the vulnerability is actively exploited and rated critical.
Action
Update to the latest version of Cisco Identity Services Engine.

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Details

Source
CISA Known Exploited Vulnerabilities (US · database · site)
Severity
critical
Published
2025-07-28
Exploitation
Observed in the wild (CISA KEV)

Original advisory: https://nvd.nist.gov/vuln/detail/CVE-2025-20337

Exploitation outlook

EPSS (FIRST.org) estimates each CVE’s probability of exploitation in the next 30 days — here is the CSIRTS.com read on those numbers.

Referenced CVEs

CVECSIRTS overviewExternal
CVE-2025-20337coverage & exploitation statusNVD · CVE.org

Recent advisories for Cisco Identity Services

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

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