High [CVE-2026-20155] Cisco Evolved Programmable Network Manager Improper Authorization Vulnerability
This high-severity Cisco advisory covers CVE-2026-20155 affecting Evolved Programmable Network Manager (EPNM).
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Summary
A vulnerability in the web-based management interface of Cisco Evolved Programmable Network Manager (EPNM) could allow an authenticated, remote attacker with low privileges to access sensitive information that they are not authorized to access. This vulnerability is due to improper authorization checks on a REST API endpoint of an affected device.
An attacker could exploit this vulnerability by querying the affected endpoint. A successful exploit could allow the attacker to view session information of active Cisco EPNM users, including users with administrative privileges, which could result in the affected device being compromised.
Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.
- Scope: This vulnerability affects Cisco EPNM, regardless of device configuration.
- 8.0 and earlier — Migrate to a fixed release
- Release 8.1 (first fixed: 8.1.2)
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
Mitigation checklist
- Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
- Release 8.0 and earlier: migrate to a fixed release.
- Release 8.1: upgrade to 8.1.2.
- There are no workarounds that address this vulnerability.
Official advisory · high-confidence parse· fetched 2 months ago·verify at source
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