CVE-2026-20190: Improper Authorization in Cisco Cisco Identity Services Engine Software
CVE-2026-20190 is a high-severity vulnerability in Cisco Identity Services Engine (ISE) Software versions 3.4.0 and 3.5.0. It allows an unauthenticated remote attacker to bypass authorization checks and view sensitive information, including hashed credentials, by sending crafted traffic to the affected device. This vulnerability does not impact integrity or availability but compromises confidentiality.
AI Analysis
Technical Summary
This vulnerability in Cisco ISE and ISE-PIC arises from improper authorization checks when accessing certain resources. An unauthenticated remote attacker can exploit this flaw by sending specially crafted traffic to the device, enabling access to sensitive information such as hashed credentials. The CVSS 3.1 base score is 7.5, reflecting network attack vector, no privileges required, no user interaction, and high confidentiality impact. No official remediation or patch information is provided in the available data.
Potential Impact
Successful exploitation allows disclosure of sensitive information, including hashed credentials, which could be leveraged in subsequent attacks. There is no impact on integrity or availability. The vulnerability affects confidentiality and could lead to further compromise if credentials are cracked or reused.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or workaround is indicated, organizations should monitor Cisco advisories for updates. Until a patch is available, limit network exposure of affected Cisco ISE devices and apply network-level access controls to restrict unauthenticated access.
CVE-2026-20190: Improper Authorization in Cisco Cisco Identity Services Engine Software
Description
CVE-2026-20190 is a high-severity vulnerability in Cisco Identity Services Engine (ISE) Software versions 3.4.0 and 3.5.0. It allows an unauthenticated remote attacker to bypass authorization checks and view sensitive information, including hashed credentials, by sending crafted traffic to the affected device. This vulnerability does not impact integrity or availability but compromises confidentiality.
CVSS v3.1
Score 7.5high
Affected software
Cisco
Cisco Identity Services Engine Software
Cisco
Cisco ISE Passive Identity Connector
pkg:github/cisco/identity-services-engineRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
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 flaw by sending specially crafted traffic to the device, enabling access to sensitive information such as hashed credentials. The CVSS 3.1 base score is 7.5, reflecting network attack vector, no privileges required, no user interaction, and high confidentiality impact. No official remediation or patch information is provided in the available data.
Potential Impact
Successful exploitation allows disclosure of sensitive information, including hashed credentials, which could be leveraged in subsequent attacks. There is no impact on integrity or availability. The vulnerability affects confidentiality and could lead to further compromise if credentials are cracked or reused.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Since no official fix or workaround is indicated, organizations should monitor Cisco advisories for updates. Until a patch is available, limit network exposure of affected Cisco ISE devices and apply network-level access controls to restrict unauthenticated access.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2025-10-08T11:59:15.395Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a32cb1b9f87a2db09260e38
Added to database: 06/17/2026, 16:28:11 UTC
Last enriched: 08/15/2026, 05:12:37 UTC
Last updated: 09/13/2026, 22:01:32 UTC
Views: 92
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