High severity · published Jun 17, 2026
CVE-2026-20190
Cisco Identity Services Engine Information Disclosure Vulnerability
7.5
CVSS
0.5%
EPSS
No
On KEV
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 vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 43% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CI
Cisco ISE Passive Identity Connector · Cisco
3.4.0 · source: vendor
CI
Cisco Identity Services Engine Software · Cisco
3.4.0; 3.4 Patch 1; 3.4 Patch 2; 3.4 Patch 3; 3.5.0; 3.4 Patch 4; +3 more · source: vendor
IS
Identity Services Engine · Cisco
3.4.0; 3.4.0; 3.4.0; 3.4.0; 3.4.0; 3.4.0; +3 more · source: NVD
IS
Identity Services Engine Passive Identity Connector · Cisco
3.4.0; 3.4.0; 3.4.0; 3.4.0; 3.4.0; 3.4.0 · source: NVD
In the news
VulnerabilityHigh
ZDI-26-580: Cisco Identity Services Engine Missing Authentication for Critical Function Information Disclosure Vulnerability
The vulnerability allows remote attackers to disclose sensitive information on affected installations of Cisco Identity Services Engine. Authentication is not required to exploit this vulnerability. The ZDI has assigned a CVSS rating of 7.5. The following CVEs are assigned: CVE-2026-20190.
Aug 13, 2026·Zero Day Initiative
Affected product
CI
Cisco Identity Services Engine Software
Cisco
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-20190
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-20190
Vendor Advisory
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-multi-G5WP8vv
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