Vulnerability-Lookup

CVE-2026-20193 (GCVE-0-2026-20193)

Vulnerability from cvelistv5 – Published: 2026-05-06 16:15 – Updated: 2026-05-06 17:48

Title

Cisco Identity Services Engine Authentication Bypass Vulnerability

Summary

A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device. This vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role.

Severity

4.3 (Medium)


                        
                          CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

SSVC

Exploitation: none Automatable: no Technical Impact: partial

CISA Coordinator · CISA-ADP (v2.0.3)

Decision recorded 2026-05-06 17:35 UTC

CWE

CWE-862 - Missing Authorization

Assigner

cisco mitre root

References

1 reference

URL	Tags
https://sec.cloudapps.cisco.com/security/center/c…

Impacted products

1 product

Vendor	Product	Version	CPE status
Cisco	Cisco Identity Services Engine Software	Affected: 3.3.0 Affected: 3.3 Patch 2 Affected: 3.3 Patch 1 Affected: 3.3 Patch 3 Affected: 3.4.0 Affected: 3.3 Patch 4 Affected: 3.4 Patch 1 Affected: 3.3 Patch 5 Affected: 3.3 Patch 6 Affected: 3.4 Patch 2 Affected: 3.3 Patch 7 Affected: 3.4 Patch 3 Affected: 3.5.0 Affected: 3.4 Patch 4 Affected: 3.3 Patch 8 Affected: 3.5 Patch 1 Affected: 3.3 Patch 9 Affected: 3.4 Patch 5 Affected: 3.5 Patch 3 Affected: 3.5 Patch 2 Affected: 3.3 Patch 10	guessed

Show details on NVD website

JSON

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CISCO-SA-ISE-UNAUTH-BYPASS-UXJRXGPB

Vulnerability from csaf_cisco - Published: 2026-05-06 16:00 - Updated: 2026-05-06 16:00

Summary

Cisco Identity Services Engine Authentication Bypass Vulnerabilities

Scope

2 vulnerabilities in this advisory, including CVE-2026-20193.

CVE-2026-20193

4.3 (Medium)


                
                  CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Known affected: 1 product

https://software.cisco.com

Open the full advisory

FKIE_CVE-2026-20193

Vulnerability from fkie_nvd - Published: 2026-05-06 17:16 - Updated: 2026-07-01 13:27

Severity

4.3 (Medium) - CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Summary

References

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

Impacted products

Vendor	Product	Version
cisco	identity_services_engine	*
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.3.0
cisco	identity_services_engine	3.4.0
cisco	identity_services_engine	3.4.0
cisco	identity_services_engine	3.4.0
cisco	identity_services_engine	3.4.0
cisco	identity_services_engine	3.4.0
cisco	identity_services_engine	3.4.0
cisco	identity_services_engine	3.5.0
cisco	identity_services_engine	3.5.0
cisco	identity_services_engine	3.5.0

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "defaultStatus": "unknown",
          "product": "Cisco Identity Services Engine Software",
          "vendor": "Cisco",
          "versions": [
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              "version": "3.3 Patch 2"
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            {
              "status": "affected",
              "version": "3.3 Patch 1"
            },
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              "status": "affected",
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            {
              "status": "affected",
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              "version": "3.5.0"
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    }
  ],
  "id": "CVE-2026-20193",
  "lastModified": "2026-07-01T13:27:03.933",
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      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
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}

GHSA-QWRQ-5C2Q-3P3M

Vulnerability from github – Published: 2026-05-06 18:30 – Updated: 2026-05-06 18:30

Details

This vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized read access to sensitive RADIUS Policy details that are restricted for their role.

Severity

4.3 (Medium)


                  
                    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2026-20193"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-862"
    ],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2026-05-06T17:16:21Z",
    "severity": "MODERATE"
  },
  "details": "A vulnerability in the RADIUS Policy API endpoints of Cisco ISE could allow an\u0026nbsp;authenticated, remote attacker with read-only Administrator privileges to gain unauthorized access to sensitive information on an affected device.\n\nThis vulnerability is due to improper role-based access control (RBAC) permissions on the RADIUS Policy API endpoints. An attacker could exploit this vulnerability by bypassing the web-based management interface and directly calling an affected endpoint. A successful exploit could allow the attacker to gain unauthorized\u0026nbsp;read access to sensitive RADIUS Policy details that are restricted for their role.",
  "id": "GHSA-qwrq-5c2q-3p3m",
  "modified": "2026-05-06T18:30:31Z",
  "published": "2026-05-06T18:30:31Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-20193"
    },
    {
      "type": "WEB",
      "url": "https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ise-unauth-bypass-uxjRXGpb"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N",
      "type": "CVSS_V3"
    }
  ]
}

WID-SEC-W-2026-1391

Vulnerability from csaf_certbund - Published: 2026-05-06 22:00 - Updated: 2026-05-06 22:00

Summary

Cisco Identity Services Engine (ISE): Mehrere Schwachstellen ermöglichen Offenlegung von Informationen

Severity

Mittel

Scope

2 vulnerabilities in this advisory, including CVE-2026-20193.

CVE-2026-20193

Known affected: 3 products

Open the full advisory

Sightings

Author	Source	Type	Date	Other

Nomenclature

Seen: The vulnerability was mentioned, discussed, or observed by the user.
Confirmed: The vulnerability has been validated from an analyst's perspective.
Published Proof of Concept: A public proof of concept is available for this vulnerability.
Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
Not confirmed: The user expressed doubt about the validity of the vulnerability.
Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

Related by attack behaviour

Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.

Action not permitted

CVE-2026-20193 (GCVE-0-2026-20193)

CISCO-SA-ISE-UNAUTH-BYPASS-UXJRXGPB

FKIE_CVE-2026-20193

GHSA-QWRQ-5C2Q-3P3M

WID-SEC-W-2026-1391

Tags

Sightings

Nomenclature

Related by attack behaviour