What it is
CVE-2025-20337 is an unauthenticated Cisco ISE API Unauthenticated Remote Code Execution Vulnerability. A vulnerability in a specific API of Cisco ISE and Cisco ISE-PIC could allow an unauthenticated, remote attacker...
Vulnerability report
Exploited in the wild
Confirmed confidence
In CISA KEV
CVE-2025-20337
Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
Cisco / Cisco Identity Services Engine Software · 3.3.0
- Severity
- CVSS 10.0 · Critical
- Confidence
- Confirmed
- Exploit status
- Exploited in the wild
- EPSS
- 66.3%
- First observed
- —
- Last observed
- —
Decision summary
What security teams need to know first
Direct answers before the deeper technical record.
Is it exploited?
Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.
Who is affected?
Cisco / Cisco Identity Services Engine Software 3.3.0.
What should we do?
Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.
Overview
Cisco ISE API Unauthenticated Remote Code Execution Vulnerability
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.
Vendor
Product
Affected
Status
Cisco
Cisco Identity Services Engine Software
3.3.0
Affected
Cisco
Cisco Identity Services Engine Software
3.3 Patch 2
Affected
Cisco
Cisco Identity Services Engine Software
3.3 Patch 1
Affected
Cisco
Cisco Identity Services Engine Software
3.3 Patch 3
Affected
Cisco
Cisco Identity Services Engine Software
3.4.0
Affected
Cisco
Cisco Identity Services Engine Software
3.3 Patch 4
Affected
Cisco
Cisco Identity Services Engine Software
3.4 Patch 1
Affected
Cisco
Cisco Identity Services Engine Software
3.3 Patch 5
Affected
Cisco
Cisco Identity Services Engine Software
3.3 Patch 6
Affected
Cisco
Cisco ISE Passive Identity Connector
3.2.0
Affected
Cisco
Cisco ISE Passive Identity Connector
3.1.0
Affected
Cisco
Cisco ISE Passive Identity Connector
3.3.0
Affected
Cisco
Cisco ISE Passive Identity Connector
3.4.0
Affected
- Published
- 16 Jul 2025
- Exploitation Reported
- 01 Jun 2026
- Attack vector
- Remote
- Complexity
- Low
- Privileges
- None
- User interaction
- None
Tags
cisa
edge
CVE References
- CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2025-20337
- cisco-sa-ise-unauth-rce-ZAd2GnJ6 sec.cloudapps.cisco.com · CVE Record https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurity...
Exploitation evidence
Why KEV Intelligence marks this CVE as exploited
Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.
Exploited in the wild
CVE
Independent exploitation attestation added to the KEV Intelligence record.
Known exploited vulnerability sources
Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.
Learn about Pro API access| Source | Added |
|---|---|
| CVE First | 2026-06-01 10:37 UTC |
| CISA | 2026-06-02 14:06 UTC |
Detection
Operational artifacts and observed signals
Make the evidence actionable in scanner, SOC, and edge-control workflows.
Observed signals
- Request targets
- 0
- User-Agents
- 0
Raw values available in Pro and Enterprise.
Scanner coverage
No scanner integrations recorded yet.
Virtual patch status
No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.
Learn about virtual patches →No detection artifacts or sensor request patterns are available for this CVE yet.
Check back as sensor telemetry and scanner integrations are updated.
Risk and context
Severity, weaknesses, and research context
CVSS v3.1
10.0
Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
EPSS
66.3%
Timeline
From disclosure to observed exploitation
-
Added to CISA KEV
Listed in the CISA Known Exploited Vulnerabilities catalog
-
Added to KEV Intelligence KEV Feed
High-confidence, third-party attested exploitation
-
CVE published
Vulnerability disclosed publicly
-
CVE ID reserved
Identifier reserved by the CNA
Pro API
Automate this intelligence
Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.
- Evidence confidence and provenance
- First-party sensor telemetry
- PoC and scanner references
- Affected versions and enrichment
- Automation-ready JSON delivery
GET /api/v2/pro/kevs/CVE-2025-20337
Free JSON includes basic KEV fields{
"cve_id": "CVE-2025-20337",
"confidence": "Confirmed",
"cvss_score": 10.0,
"cvss_estimated": false,
"epss_score": 0.66294,
"exploit_status": {
"exploited_in_the_wild": true,
"active_exploitation_observed": false
},
"sensor_telemetry": { "attempts": 0, "sensors": 0 }
}Early warning alerts
Get alerts on high-impact exploitation
Receive curator-selected alerts when exploitation activity warrants attention. Each alert includes the evidence and context needed to decide what requires attention now.