Is CVE-2017-6747 being actively exploited?

CVE-2017-6747 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2017-6747?

CVE-2017-6747 has a CVSS 3.0 base score of 9.8 (CRITICAL).

CVE-2017-6747

CRITICAL · CVSS 9.8EPSS 5.5%EU EUVD

A vulnerability in the authentication module of Cisco Identity Services Engine (ISE) could allow an unauthenticated, remote attacker to bypass local authentication. The vulnerability is due to improper handling of authentication requests and policy assignment for externally authenticated users. An attacker could exploit this vulnerability by authenticating with a valid external user account that matches an internal username and incorrectly receiving the authorization policy of the internal account. An exploit could allow the attacker to have Super Admin privileges for the ISE Admin portal. This vulnerability does not affect endpoints authenticating to the ISE. The vulnerability affects Cisco ISE, Cisco ISE Express, and Cisco ISE Virtual Appliance running Release 1.3, 1.4, 2.0.0, 2.0.1, or 2.1.0. Release 2.2.x is not affected. Cisco Bug IDs: CSCvb10995.

Key facts

CVSS score: 9.8 (v3.0)
Severity: CRITICAL
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Weakness (CWE): CWE-287
EPSS score: 5.5% (93th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2017-15801)
Published: August 7, 2017
NVD last modified: June 17, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2017-15801 in the EU Vulnerability Database. Last updated in EUVD on August 5, 2024.

View on the EU Vulnerability Database

Affected products

cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine
cisco / identity services engine

Certified products that may be affected

1 FIPS 140 or Common Criteria certified product, from automated matching by sec-certs.org.

Cisco ISE v2.0 - Cisco Systems, Inc. - Common Criteria CCEVS-VR-10795-2017 - archived

References

http://www.securitytracker.com/id/1039054(Third Party Advisory, VDB Entry)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170802-ise(Vendor Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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