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CVE-2026-20190: Improper Authorization in Cisco Cisco Identity Services Engine Software

0
High
VulnerabilityCVE-2026-20190cvecve-2026-20190
Published: Wed Jun 17 2026 (06/17/2026, 16:17:04 UTC)
Source: CVE Database V5
Vendor/Project: Cisco
Product: Cisco Identity Services Engine Software

Description

A vulnerability in Cisco ISE and ISE-PIC could allow an unauthenticated, remote attacker to view sensitive information on an affected device. This vulnerability is due to improper authorization checks when a resource is accessed. An attacker could exploit this vulnerability by sending crafted traffic to an affected device. A successful exploit could allow the attacker to gain access to sensitive information, including hashed credentials that could be used in future attacks.

CVSS v3.1

Score 7.5high

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Affected software

GitHub Actionsmore threats →ai
cisco/identity-services-engine
pkg:github/cisco/identity-services-engine
Affected versions
=3.4.0=3.5.0

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AI-Powered Analysis

Machine-generated threat intelligence

AILast updated: 06/17/2026, 16:42:37 UTC

Technical Analysis

This vulnerability in Cisco ISE and ISE-PIC arises from improper authorization checks when accessing certain resources. An unauthenticated remote attacker can exploit this by sending crafted traffic, potentially gaining access to sensitive information such as hashed credentials. The CVSS 3.1 base score is 7.5, reflecting network attack vector, low attack complexity, no privileges required, no user interaction, and high confidentiality impact without integrity or availability impact. The affected versions explicitly identified are 3.4.0 and 3.5.0. No vendor advisory or patch information is currently available.

Potential Impact

Successful exploitation allows an unauthenticated remote attacker to access sensitive information on the affected Cisco ISE device, including hashed credentials. This could facilitate further attacks leveraging the disclosed credentials. There is no indication of impact on system integrity or availability.

Mitigation Recommendations

Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until an official fix is available, restrict network access to Cisco ISE management interfaces and monitor for suspicious traffic patterns targeting these devices.

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Technical Details

Data Version
5.2
Assigner Short Name
cisco
Date Reserved
2025-10-08T11:59:15.395Z
Cvss Version
3.1
State
PUBLISHED
Remediation Level
null

Threat ID: 6a32cb1b9f87a2db09260e38

Added to database: 6/17/2026, 4:28:11 PM

Last enriched: 6/17/2026, 4:42:37 PM

Last updated: 6/17/2026, 6:23:07 PM

Views: 2

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