CVE-2025-20270 Overview
CVE-2025-20270 is an information disclosure vulnerability in the web-based management interface of Cisco Evolved Programmable Network Manager (EPNM) and Cisco Prime Infrastructure. The flaw stems from improper validation of requests to API endpoints. An authenticated, low-privileged remote attacker can send a crafted request to a specific API endpoint and retrieve sensitive configuration data that should be restricted. The weakness is tracked as [CWE-200] (Exposure of Sensitive Information to an Unauthorized Actor).
Critical Impact
A low-privileged authenticated user can read sensitive configuration information from the affected network management system, exposing data useful for lateral movement and further attacks.
Affected Products
- Cisco Evolved Programmable Network Manager (EPNM)
- Cisco Prime Infrastructure
- Web-based management interface API endpoints on the above products
Discovery Timeline
- 2025-09-03 - CVE-2025-20270 published to NVD
- 2026-06-17 - Last updated in NVD database
Technical Details for CVE-2025-20270
Vulnerability Analysis
The vulnerability resides in how the web-based management interface validates incoming API requests. Specific API endpoints perform insufficient authorization checks on the requesting user. As a result, an account with only low privileges can access responses that should be restricted to higher-privileged administrators.
Successful exploitation returns sensitive configuration information from the managed infrastructure. This data can include network device details, inventory, or other operational metadata that supports reconnaissance against the broader managed environment. Attackers chain this disclosure with other weaknesses to escalate access or map internal topology.
The flaw does not grant write access or directly impact system integrity or availability. However, information gained can accelerate follow-on intrusions into managed network devices.
Root Cause
The root cause is improper validation of requests to specific API endpoints in the EPNM and Prime Infrastructure web management interface. The endpoints authenticate the caller but fail to enforce role-based access controls on the returned data. Any valid, low-privileged session can therefore retrieve records intended for privileged roles.
Attack Vector
Exploitation requires network access to the management interface and valid credentials for a low-privileged account. The attacker sends a legitimate HTTP request to the vulnerable API endpoint. No user interaction is required, and the attack complexity is low. Because the management interface is typically reachable from internal operations networks, insider threats and compromised operator credentials present the primary exploitation path.
No public proof-of-concept exploit or in-the-wild exploitation has been reported. See the Cisco Security Advisory for technical specifics on the affected endpoint.
Detection Methods for CVE-2025-20270
Indicators of Compromise
- Unexpected API requests from low-privileged service or operator accounts to EPNM or Prime Infrastructure endpoints that return configuration data.
- Unusual volumes of successful HTTP 200 responses to configuration-related API paths originating from non-administrative sessions.
- Session activity from accounts accessing API resources inconsistent with their assigned role or job function.
Detection Strategies
- Enable verbose API access logging on EPNM and Prime Infrastructure and forward logs to a centralized SIEM for correlation.
- Baseline normal API usage per user role and alert on deviations, especially low-privileged accounts touching configuration endpoints.
- Correlate web interface authentication events with downstream API calls to identify sessions enumerating restricted resources.
Monitoring Recommendations
- Monitor outbound data volumes from the management interface for anomalous responses to low-privileged sessions.
- Review Cisco EPNM and Prime Infrastructure audit logs weekly for API access patterns outside expected administrative workflows.
- Alert on repeated access attempts to the specific API endpoints identified in the Cisco Security Advisory.
How to Mitigate CVE-2025-20270
Immediate Actions Required
- Apply the fixed software release identified in the Cisco Security Advisory for EPNM and Prime Infrastructure.
- Audit all local and remote accounts on the management interface and remove unused or stale low-privileged accounts.
- Rotate credentials for operator accounts that may have been exposed or shared across teams.
- Restrict network access to the EPNM and Prime Infrastructure management interface to trusted administrative subnets only.
Patch Information
Cisco has published fixed software versions in the vendor advisory. Administrators should consult the Cisco Security Advisory cisco-sa-epnm-info-dis-zhPPMfgz for the specific fixed releases that address CVE-2025-20270 and plan an upgrade during the next change window.
Workarounds
- No vendor-documented workaround is available. Upgrading to a fixed release is the only remediation.
- Reduce exposure by placing the management interface behind a jump host or VPN with strict access control lists.
- Enforce least privilege by auditing role assignments and removing API access from accounts that do not require it.
# Configuration example: restrict management interface access via ACL
# Replace 10.10.0.0/24 with your administrative subnet
access-list MGMT_ACCESS permit tcp 10.10.0.0 0.0.0.255 host <epnm_mgmt_ip> eq 443
access-list MGMT_ACCESS deny tcp any host <epnm_mgmt_ip> eq 443
access-list MGMT_ACCESS permit ip any any
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
