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CVE-2026-20195 Cisco Identity Services Engine

Affected softwareCisco Identity Services Engine
Severity5.3 Medium CVSS 3.1
WeaknessCWE-204
Published6 May 2026
Updated26 Oct 2026

Description

A vulnerability in an identity management API endpoint of Cisco ISE could allow an unauthenticated, remote attacker to enumerate valid user accounts on an affected device. This vulnerability exists because error messages are observed when the affected API endpoint is called. An attacker could exploit this vulnerability by sending a series of crafted requests to the affected endpoint and analyzing the differentiated responses. A successful exploit could allow the attacker to compile a list of valid usernames on an affected system.

Exploitation status

No public exploit

No exploit has been reported in the sources we check.

  • CISA KEV not listed
  • VulnCheck KEV not listed
  • CISA Vulnrichment exploitation: none
  • Indexed PoC none indexed
  • EPSS 0.27% chance in 30 days

Waratek protection

Outside Waratek scope

A Java vulnerability, but not one Waratek protects. It affects only Java on a user's desktop (applets, Web Start, JavaFX, the installer), sits in a product the Waratek agent can't be installed into, or is in a package we don't expect in business applications. The decision below says which.

  • Protection none
  • Action not pursued none
  • Review automated Upstream data
  • Record active
Decided by The only affected product being a sealed appliance image, where Java runs but no -javaagent can be attached
Finding This CVE names only products the Waratek agent cannot be installed into (cisco/identity_services_engine). They ship as sealed appliance images or as native code with no application JVM, so there is no start-up line to add -javaagent to. The vulnerability may well be a Java one; it is permanently out of ARMR's reach rather than outside its subject.

Affected software and releases

Products and versions

1 product, 21 version entries
SourceVendorProductSchemeAffected versions
nvd cisco identity services engine generic ≤ 3.2.0 · 3.3.0 · 3.3.0:patch1 · 3.3.0:patch2 · 3.3.0:patch3 · 3.3.0:patch4 · 3.3.0:patch5 · 3.3.0:patch6 · 3.3.0:patch7 · 3.3.0:patch8 · 3.3.0:patch9 · 3.3.0:patch10 · 3.4.0 · 3.4.0:patch1 · 3.4.0:patch2 · 3.4.0:patch3 · 3.4.0:patch4 · 3.4.0:patch5 · 3.5.0 · 3.5.0:patch1 · 3.5.0:patch2

References

URLTags
https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb Vendor Advisory

Timeline

Published2026-05-06By the CVE Program.
NVD record modified2026-10-26NVD's own last-modified date for this record.