CVE-2017-6747

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2022-05-13. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 5%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
51(Track)
EG Risk 51/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation5% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
5%
EPSS %ILE
92%
KEV
Not listed

Published

August 7, 2017

Last Modified

June 17, 2026

Advisory Details (2)

Auto-updated Jul 26, 2026
No patch confirmed yet.
generic

Cisco Identity Services Engine Authentication Bypass Vulnerability

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170802-ise
generic
http://www.securitytracker.com/id/1039054

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 5× in last 7d / 37× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 114 total refreshes for this CVE.

  1. 2026-07-28 15:32 UTCEPSS rescore
  2. 2026-07-23 14:15 UTCEPSS rescore
  3. 2026-07-23 01:30 UTCEG score recompute
  4. 2026-07-22 22:09 UTCEG score recompute
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  25. 2026-07-08 15:11 UTCEPSS rescore
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  1. 2026-07-06 16:24 UTCEPSS rescore
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  8. 2026-07-02 16:54 UTCEPSS rescore
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  10. 2026-06-30 23:19 UTCEPSS rescore
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  12. 2026-06-29 14:03 UTCEPSS rescore
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  22. 2026-06-22 14:23 UTCEPSS rescore
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  24. 2026-06-21 14:54 UTCEPSS rescore
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  26. 2026-06-21 01:57 UTCEPSS rescore
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  28. 2026-06-19 19:23 UTCEPSS rescore
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  30. 2026-06-18 17:50 UTCEPSS rescore
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  40. 2026-06-11 13:57 UTCEPSS rescore
  41. 2026-06-10 22:15 UTCEPSS rescore
  42. 2026-06-10 13:19 UTCEPSS rescore
  43. 2026-06-08 14:14 UTCEPSS rescore
  44. 2026-06-08 14:14 UTCEPSS rescore
  45. 2026-06-07 15:22 UTCEPSS rescore
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  47. 2026-06-06 13:45 UTCEPSS rescore
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  49. 2026-06-05 22:44 UTCEPSS rescore
  50. 2026-06-05 06:08 UTCEPSS rescore
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  53. 2026-06-02 20:11 UTCEPSS rescore
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  63. 2026-05-27 13:38 UTCEPSS rescore
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  67. 2026-05-26 07:17 UTCEPSS rescore
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  69. 2026-05-22 21:15 UTCEPSS rescore
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  74. 2026-05-21 22:40 UTCEPSS rescore
  75. 2026-05-20 22:37 UTCEPSS rescore

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Frequently asked(5)

What is CVE-2017-6747?
CVE-2017-6747 is a critical vulnerability published on August 7, 2017. 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…
When was CVE-2017-6747 disclosed?
CVE-2017-6747 was first published in the National Vulnerability Database on August 7, 2017, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2017-6747 actively exploited?
CVE-2017-6747 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 5% probability of exploitation in the next 30 days, which ranks it in the top 8.1% of all scored CVEs.
What is the CVSS score of CVE-2017-6747?
CVE-2017-6747 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2017-6747?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2017-6747, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

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