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Medium5.3Cisco

Medium [CVE-2026-20193 +1] Cisco Identity Services Engine Authentication Bypass Vulnerabilities

This medium-severity Cisco advisory covers CVE-2026-20193 and CVE-2026-20195 affecting ISE, Identity Services Engine Software.

cisco-sa-ise-unauth-bypass-uxjRXGpb Published May 6, 2026Updated by vendor May 6, 2026
CVE-2026-20193CVE-2026-20195
Affected products & platforms
CiscoISEIdentity Services Engine
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Summary

Multiple vulnerabilities in Cisco Identity Services Engine (ISE) could allow a remote attacker to bypass authorization mechanisms or examine error messages to gain access to sensitive information on an affected device.

For more information about these vulnerabilities, see the Details section of this advisory.

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

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

Affected versions
  • Scope: At the time of publication, these vulnerabilities affected Cisco ISE, regardless of device configuration.
  • 3.2 and earlier — Migrate to a fixed release
  • Release 3.3 (first fixed: 3.3 Patch 11)
  • Release 3.4 (first fixed: 3.4 Patch 6)
  • Release 3.5 (first fixed: 3.5 Patch 3)

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

Fixed versions
  • 3.3 Patch 11
  • 3.4 Patch 6
  • 3.5 Patch 3

Official advisory · high-confidence parse· fetched 2 months 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 a fixed release.
  • Release 3.3: upgrade to 3.3 Patch 11.
  • Release 3.4: upgrade to 3.4 Patch 6.
  • Release 3.5: upgrade to 3.5 Patch 3.
Workaround status
  • There are no workarounds that address these vulnerabilities.

Official advisory · high-confidence parse· fetched 2 months ago·verify at source

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