CASCACascade Atlas

Evidence dossier

CVE-2026-76460

Cisco Identity Services Engine Authentication Bypass Vulnerability

Exploited in the wild (CISA KEV since Sep 16, 2026). cisco reports CVSS 3.1 10.0. EPSS estimates 14.0% exploit likelihood as of Oct 22, 2026.

72.5–87.3Priority evidence range
Evidence through Oct 22, 2026, 6:07 PM UTC

As of Oct 22, 2026

Normalized restatement

A vulnerability in an API of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to bypass authentication. This vulnerability is due to insufficient authentication control on an API endpoint. An attacker could exploit this vulnerability by sending a crafted request to an affected API endpoint. A successful exploit could allow the attacker to gain unauthorized access to the affected device by bypassing the web-based management interface.

State
PUBLISHED
Published
Sep 16, 2026
Updated
Oct 7, 2026
Evidence coverage
85%

Evidence chronology

What was known when

Download this view's receipt →
  1. Source dateFirst observed by CASCA
    CISA KEV

    Exploitation cataloged: Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability

    Inspect raw assertion
    Field
    observed_exploitation
    Value
    Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
    Original evidence ↗
  2. Source dateSource date omittedFirst observed by CASCA
    CISA-ADP

    Record text: CISA ADP Vulnrichment

    Inspect raw assertion
    Field
    container
    Value
    CISA ADP Vulnrichment
    Original evidence ↗
  3. Source dateSource date omittedFirst observed by CASCA
    cisco

    Record text: Cisco Identity Services Engine Authentication Bypass Vulnerability

    Inspect raw assertion
    Field
    container
    Value
    Cisco Identity Services Engine Authentication Bypass Vulnerability
    Original evidence ↗
  4. Source dateFirst observed by CASCA
    FIRST EPSS

    EPSS score: 14.03% probability · 96.55th percentile

    Inspect raw assertion
    Field
    model_probability
    Value
    Probability 0.140260000000; percentile 0.965520000000
    Original evidence ↗
ExploitationCatalog member

CISA KEV · catalog date Sep 16, 2026 · first observed Sep 16, 2026

Exploit likelihood14.03%

FIRST EPSS · score date Oct 22, 2026 · 96.6th percentile · first observed Oct 22, 2026

SeverityCVSS 10.0

cisco · CVSS 3.1 · first observed Oct 8, 2026 · same-version scores align in this snapshot

Evidence detail

Source limits and decisions

Why each evidence state has this value

Outside this view’s verified evidence

Reason detail begins outside this selected snapshot; the state remains source-bound.

Source comparison

Who said what

CISA KEVOriginal assertion
Exploitation cataloged

Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability

Inspect raw assertion
Field
observed_exploitation
Value
Cisco Identity Services Engine Incorrect Use of Privileged APIs Vulnerability
Source dateFirst observed by CASCAOriginal evidence ↗
CISA-ADPIndependent enrichment
Record text

CISA ADP Vulnrichment

Inspect raw assertion
Field
container
Value
CISA ADP Vulnrichment
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
ciscoOriginal assertion
Record text

Cisco Identity Services Engine Authentication Bypass Vulnerability

Inspect raw assertion
Field
container
Value
Cisco Identity Services Engine Authentication Bypass Vulnerability
Source dateSource date omittedFirst observed by CASCAOriginal evidence ↗
FIRST EPSSOriginal assertion
EPSS score

14.03% probability · 96.55th percentile

Inspect raw assertion
Field
model_probability
Value
Probability 0.140260000000; percentile 0.965520000000
Source dateFirst observed by CASCAOriginal evidence ↗

Applicability

Cited product scope

Trace impact →

90 scope groups

cisco · source assertedCiscoCisco Identity Services Engine SoftwareDirect source scope
Affected: 3.1.0 p8Affected: 3.1.0 p9Affected: 3.3 Patch 2Affected: 3.3 Patch 1Affected: 3.3 Patch 3Affected: 3.4.0Affected: 3.2.0 p7Affected: 3.3 Patch 4Affected: 3.4 Patch 1Affected: 3.1.0 p10Affected: 3.3 Patch 5Affected: 3.3 Patch 6Affected: 3.4 Patch 2Affected: 3.3 Patch 7Affected: 3.4 Patch 3Affected: 3.5.0Affected: 3.4 Patch 4Affected: 3.3 Patch 8Affected: 3.2 Patch 8Affected: 3.5 Patch 1Affected: 3.3 Patch 9Affected: 3.2 Patch 9Affected: 3.4 Patch 5Affected: 3.5 Patch 3Affected: 3.5 Patch 2Affected: 3.3 Patch 10Affected: 3.3 Patch 11Affected: 3.4 Patch 6Affected: 3.2 Patch 10Affected: 3.1.0 p11
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "3.1.0 p8"}, {"status": "affected", "version": "3.1.0 p9"}, {"status": "affected", "version": "3.3 Patch 2"}, {"status": "affected", "version": "3.3 Patch 1"}, {"status": "affected", "version": "3.3 Patch 3"}, {"status": "affected", "version": "3.4.0"}, {"status": "affected", "version": "3.2.0 p7"}, {"status": "affected", "version": "3.3 Patch 4"}, {"status": "affected", "version": "3.4 Patch 1"}, {"status": "affected", "version": "3.1.0 p10"}, {"status": "affected", "version": "3.3 Patch 5"}, {"status": "affected", "version": "3.3 Patch 6"}, {"status": "affected", "version": "3.4 Patch 2"}, {"status": "affected", "version": "3.3 Patch 7"}, {"status": "affected", "version": "3.4 Patch 3"}, {"status": "affected", "version": "3.5.0"}, {"status": "affected", "version": "3.4 Patch 4"}, {"status": "affected", "version": "3.3 Patch 8"}, {"status": "affected", "version": "3.2 Patch 8"}, {"status": "affected", "version": "3.5 Patch 1"}, {"status": "affected", "version": "3.3 Patch 9"}, {"status": "affected", "version": "3.2 Patch 9"}, {"status": "affected", "version": "3.4 Patch 5"}, {"status": "affected", "version": "3.5 Patch 3"}, {"status": "affected", "version": "3.5 Patch 2"}, {"status": "affected", "version": "3.3 Patch 10"}, {"status": "affected", "version": "3.3 Patch 11"}, {"status": "affected", "version": "3.4 Patch 6"}, {"status": "affected", "version": "3.2 Patch 10"}, {"status": "affected", "version": "3.1.0 p11"}]
cisco · source assertedCiscoCisco ISE Passive Identity ConnectorDirect source scope
Affected: 3.4.0Affected: 3.5.0
Source-reported scope

Canonical linkage remains open; the cited source assertion is retained below.

Inspect raw assertion[{"status": "affected", "version": "3.4.0"}, {"status": "affected", "version": "3.5.0"}]
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:-:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch1:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch10:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch11:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch2:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch3:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch4:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch5:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch6:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch7:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch8:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.1.0:patch9:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:-:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch1:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch10:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch2:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch3:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch4:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch5:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch6:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch7:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch8:*:*:*:*:*:*
NVD · source assertedVendor unspecified by sourceProduct unspecified by sourceDirect source scope
Version bounds not stated
Scope supported
Inspect raw assertioncpe:2.3:a:cisco:identity_services_engine:3.2.0:patch9:*:*:*:*:*:*

Affected-product evidence

Accepted scope and product mapping

0 canonical links · 0 source-reported links

Applicability remains source-scoped; safety and exposure remain unassessed.

Assessments

CVSS by origin

10.0
psirt@cisco.comCVSS 3.1 · role Secondary · priority eligiblevalid_matchCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H
10.0
ciscoCVSS 3.1 · role unknown · display onlyDirect record assessment retained outside normalized eligibilityCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H

Evidence boundaries

  • KEV membership is authoritative for the catalog, not proof of exposure in any environment.
  • EPSS is a dated model probability and not an individual-environment prediction.
  • Affected or fixed status applies only to the exact cited product and version scope; remaining scope stays source-scoped.
  • NVD-carried upstream facts remain derivative; independent corroboration requires a separately authored source.
  • Only NVD metrics validated under the generation-bound calculator are Public Priority eligible; direct CVE record metrics remain display-only.
  • NVD CVSS source eligibility is closed: NVD-authored, exact record-source, or registered same-CVE container origin; unmapped sources remain display-only.
  • Factor D remains source-scoped; an accepted canonical mapping-obligation ledger lies outside this snapshot.
  • Core replay supports the active and immediately prior generation; retrospective valid-at replay is deferred.
  • OSV aggregation and OSV-converted NVD material are not independent corroboration.
  • Red Hat facts are vendor assertions for the exact supplied products.
  • Nonmembership and not-yet-observed states are not proof of safety.