CVE-2026-20155

| EUVD-2026-17955 HIGH
2026-04-01 cisco GHSA-g5c4-x88j-p4hw
8.0
CVSS 3.1
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CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

Lifecycle Timeline

3
Analysis Generated
Apr 01, 2026 - 17:30 vuln.today
EUVD ID Assigned
Apr 01, 2026 - 17:30 euvd
EUVD-2026-17955
CVE Published
Apr 01, 2026 - 16:29 nvd
HIGH 8.0

Description

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.

Analysis

Improper authorization in Cisco EPNM's REST API allows authenticated low-privilege attackers to access active user session data, including administrative credentials, enabling full device compromise. The vulnerability (CWE-862: Missing Authorization) affects the web management interface with CVSS 8.0 severity. …

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Remediation

Within 24 hours: Identify all Cisco EPNM instances in your environment and document active user accounts with API access; rotate all administrative credentials managed through EPNM. Within 7 days: Restrict REST API access to high-privilege accounts only; implement network segmentation to limit EPNM management interface access to trusted administrator networks; enable audit logging for all REST API calls. …

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Priority Score

40
Low Medium High Critical
KEV: 0
EPSS: +0.1
CVSS: +40
POC: 0

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CVE-2026-20155 vulnerability details – vuln.today

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