CVE-2026-20072 Overview
CVE-2026-20072 affects the web-based management interface of Cisco Identity Services Engine (ISE). The flaw allows an authenticated, remote attacker with administrative privileges to obtain sensitive information about network users outside their assigned security group. Certain files in the interface lack proper authorization enforcement, letting an attacker export user records that include passwords normally hidden from administrators. The issue is classified under CWE-863: Incorrect Authorization.
Critical Impact
Attackers with administrative rights can export user data across security-group boundaries and view plaintext passwords, enabling credential reuse against downstream systems.
Affected Products
- Cisco Identity Services Engine (ISE) web-based management interface
- Deployments where administrators are scoped to specific security groups
- Environments exposing user password material through export functionality
Discovery Timeline
- 2026-09-16 - CVE-2026-20072 published to NVD
- 2026-09-16 - Last updated in NVD database
Technical Details for CVE-2026-20072
Vulnerability Analysis
Cisco ISE enforces role-based administration through security groups that scope which network users each administrator can manage. CVE-2026-20072 breaks that boundary. Specific files served by the web-based management interface do not verify whether the requesting administrator has authorization over the target users before returning data.
An authenticated administrator can invoke the user export function and receive records for users outside their assigned group. The export output additionally contains password values that the standard administrative UI redacts. This exposes credential material that should never leave the identity store in readable form.
The vulnerability requires authentication and administrative privileges, which limits the pool of potential attackers. Impact is confined to confidentiality, with no direct effect on integrity or availability of the ISE deployment.
Root Cause
The root cause is missing authorization enforcement on specific export-related endpoints. The application authenticates the session and confirms an administrator role, but omits the object-level check that ties the request to the administrator's assigned security group. Password fields that should be filtered from export payloads are also returned. This is a classic CWE-863 authorization gap combined with information exposure.
Attack Vector
Exploitation is network-based against the ISE management interface. An attacker who already holds administrative credentials with management rights over some subset of network users triggers the export function against users outside that subset. The response contains the target users' records, including password values. No user interaction or additional privilege escalation is required after initial authentication.
No public proof-of-concept or in-the-wild exploitation has been reported. Refer to the Cisco Security Advisory for vendor-supplied technical detail.
Detection Methods for CVE-2026-20072
Indicators of Compromise
- Unexpected user export operations initiated by administrators whose scope should not include the exported users
- Administrative sessions accessing export endpoints outside normal operational windows
- Downstream authentication anomalies for accounts whose credentials were present in an exported dataset
Detection Strategies
- Enable and centralize Cisco ISE administrative audit logs, focusing on user export and bulk data-retrieval actions
- Correlate administrator identity and assigned security group with the identities of exported user records to detect scope violations
- Alert on any export request returning records outside the administrator's authorized group
Monitoring Recommendations
- Forward ISE administrative and audit logs to a centralized analytics platform for retention and correlation
- Baseline normal export activity per administrator and alert on volume or scope deviations
- Monitor for credential reuse patterns against services integrated with ISE-managed identities
How to Mitigate CVE-2026-20072
Immediate Actions Required
- Review the Cisco Security Advisory cisco-sa-ise-multi-vuln-kWLeNnRD and apply fixed Cisco ISE releases as identified by Cisco
- Audit the list of ISE administrators and revoke rights that exceed operational need
- Rotate passwords for user accounts that may have been exposed through unauthorized exports
Patch Information
Cisco has published guidance in the security advisory cisco-sa-ise-multi-vuln-kWLeNnRD. Administrators should consult the advisory for the specific fixed versions applicable to their deployment and follow Cisco's upgrade procedure for ISE.
Workarounds
- Restrict access to the ISE web-based management interface to a dedicated management network segment
- Enforce multi-factor authentication for all ISE administrators to reduce the risk of account misuse
- Apply least-privilege scoping to administrator security groups and remove broad user-management rights where not required
- Monitor administrative audit logs for user export activity until the patched release is deployed
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
