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Review reviewHigh

CVE-2026-20190

Cisco Cisco Identity Services Engine Software, Cisco ISE Passive Identity Connector, identity services engine

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
7.5
EPSS
0.50%
40.3% percentile
CISA KEV
Not listed
Published
2026.06.18
PRIORITY ASSESSMENT

Review review

The CVSS severity warrants an early asset and exposure review.

Known exploitationNot established by KEV
Exploit probability0.50%
Technical severityCVSS 7.5

Vulnerability overview

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.

Affected product and versions

Product
Cisco Cisco Identity Services Engine Software, Cisco ISE Passive Identity Connector, identity services engine
Affected versions
3.4.0, 3.4 Patch 1, 3.4 Patch 2, 3.4 Patch 3, 3.5.0, 3.4 Patch 4, 3.5 Patch 1, 3.4 Patch 5, 3.5 Patch 2
Fixed versions
No verified fixed-version field is available yet

Recommended response sequence

Confirm exposure before applying a vendor-supported change.

Full remediation guide
  1. 1
    Identify

    Confirm that Cisco Cisco Identity Services Engine Software, Cisco ISE Passive Identity Connector, identity services engine and an affected version are present.

  2. 2
    Prioritize

    Combine exploitation signals with asset exposure and business criticality.

  3. 3
    Remediate

    Follow the vendor advisory or supported update path and preserve rollback options.

  4. 4
    Verify

    Recheck the version, service health, access paths, and relevant logs.

Technical data

CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CWE
CWE-285
CVE-2026-20190 — Cisco Cisco Identity Services Engine Software, Cisco ISE Passive Identity Connector, identity services engine | SECUFOCUS NOW