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Advisory severityMedium4.3Cisco

Medium [CVE-2026-20285 +1] Cisco Identity Services Engine Authorization Bypass Vulnerabilities

This medium-severity Cisco advisory covers CVE-2026-20285 and CVE-2026-20286 affecting ISE Passive Identity Connector, Identity Services Engine Software.

Aggregated and source-linked by VulniPulse. Data sources, validation and limitations. This bulletin covers 2 CVEs; its score, affected versions and guidance may apply to different issues within that bulletin.

cisco-sa-ise-auth-bypass-1-MxcTNgwx Source published Source updated

VulniPulse record published Record updated

CVE-2026-20285CVE-2026-20286
Affected products & platforms
CiscoISEIdentity Services Engine
Open source advisory

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Summary

Multiple vulnerabilities in the web-based management interface of Cisco Identity Services Engine (ISE) and Cisco ISE Passive Identity Connector (ISE-PIC) could allow an authenticated, remote attacker to modify parts of the configuration on an affected device.

These vulnerabilities are due to the lack of server-side validation of Administrator permissions. An attacker could exploit these vulnerabilities by submitting a crafted HTTP request to an affected system.

A successful exploit could allow the attacker to modify descriptions of files on specific pages. To exploit these vulnerabilities, an attacker would need valid Administrator credentials.

Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities.

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 products named by the advisory: Identity Services Engine Software.

Affected versions
  • Scope: CVE-2026-20286: At the time of publication, this vulnerability affected Cisco ISE, regardless of device configuration.
  • 3.2 and earlier — Migrate to fixed release
  • Release 3.3 (first fixed: 3.3 Patch 12)
  • Release 3.4 (first fixed: 3.4 Patch 7)
  • Release 3.51 (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.
  • Release 3.2 and earlier: migrate to fixed release.
  • Release 3.3: upgrade to 3.3 Patch 12.
  • Release 3.4: upgrade to 3.4 Patch 7.
  • Release 3.51: upgrade to 3.5 Patch 4.
Workaround status
  • There are no workarounds that address these vulnerabilities.

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

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