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Advisory severityMedium4.9Cisco

Medium [CVE-2026-20235] Cisco Identity Services Engine Information Disclosure Vulnerability

This medium-severity Cisco advisory covers CVE-2026-20235 affecting Identity Services Engine Software.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.

cisco-sa-ise-inf-disc-LFWvcCu Source published Source updated

VulniPulse record published Record updated

CVE-2026-20235
Affected products & platforms
CiscoISEIdentity Services Engine
Open source advisory

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Summary

A vulnerability in the API of Cisco Identity Services Engine (ISE) could allow an authenticated, remote attacker to view sensitive information on an affected device. To exploit this vulnerability, the attacker must have valid administrative credentials.

This vulnerability is due to insufficient validation of user-supplied parameters in API requests. An attacker could exploit this vulnerability by sending a crafted API request 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.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is part of a group of advisories. For a complete list of the advisories and links to them, see Cisco Advance Notification for Publication of September 16, 2026, Security Advisories.

In addition, for further documentation of improvements and fixes in Cisco Identity Services Engine, see Cisco Identity Services Engine Security Hardening Release: September 2026.

Affected product named by the advisory: Identity Services Engine Software.

Affected versions
  • Scope: At the time of publication, this vulnerability affected Cisco ISE, regardless of device configuration.
  • Earlier than 3.3 — Migrate to a fixed release
  • Release 3.3 (first fixed: 3.3 Patch 12)
  • Release 3.4 (first fixed: 3.4 Patch 7)
  • Release 3.5 (first fixed: 3.5 Patch 4)

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Fixed versions
  • 3.3 Patch 12
  • 3.4 Patch 7
  • 3.5 Patch 4

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

Mitigation checklist

Recommended fix / mitigation
  • Upgrade to the first fixed release for your train per the Fixed Releases table in this advisory.
  • Earlier than 3.3: migrate to a fixed release.
  • Release 3.3: upgrade to 3.3 Patch 12.
  • Release 3.4: upgrade to 3.4 Patch 7.
  • Release 3.5: upgrade to 3.5 Patch 4.
Workaround status
  • There are no workarounds that address this vulnerability.

Official advisory · high-confidence parse· fetched 13 days ago·verify at source

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