CVE-2017-6663: Technical Deep-Dive (Auto Refreshed)

Generated on 2026-04-02T23:34:11.345Z. This file is automatically regenerated every 30 minutes by the CVE AI enrichment job using web sources (NVD, MITRE, CISA KEV, GitHub).

Executive Technical Summary

A vulnerability in the Autonomic Networking feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause autonomic nodes of an affected system to reload, resulting in a denial of service (DoS) condition. More Information: CSCvd88936. Known Affected Releases: Denali-16.2.1 Denali-16.3.1.

• Context preserved from previous revision: A vulnerability in the Autonomic Networking feature of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, adjacent attacker to cause autonomic nodes of an affected system to reload, resulting in a denial of service (DoS) condition. More Information: CSCvd88936. Known Affected Releases: Denali-16.2.1 Denali-16.3.1. Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.

Technical Details

• CVE: CVE-2017-6663
• KEV date added: 2022-03-03
• KEV due date: 2022-03-24
• NVD published: 2017-08-07
• NVD modified: 2025-10-22
• MITRE modified: 2025-10-21
• CVSS base score: 6.5
• CVSS vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
• CVSS exploitability score: 2.8
• CVSS impact score: 3.6
• Attack vector: Adjacent
• Attack complexity: Low
• Privileges required: None
• User interaction: None
• Scope: Unchanged
• Confidentiality impact: None
• Integrity impact: None
• Availability impact: High

Versions and Products Impacted

• cisco / ios (versions: 15.2(3)e)
• cisco / ios (versions: 15.2(3)e1)
• cisco / ios (versions: 15.2(3)e2)
• cisco / ios (versions: 15.2(3)e3)
• cisco / ios (versions: 15.2(3)e4)
• cisco / ios (versions: 15.2(3)e5)
• cisco / ios (versions: 15.2(3a)e)
• cisco / ios (versions: 15.2(3a)e1)
• cisco / ios (versions: 15.2(3m)e2)
• cisco / ios (versions: 15.2(3m)e3)
• cisco / ios (versions: 15.2(3m)e6)
• cisco / ios (versions: 15.2(3m)e8)
• cisco / ios (versions: 15.2(4)e)
• cisco / ios (versions: 15.2(4)e1)
• cisco / ios (versions: 15.2(4)e2)
• cisco / ios (versions: 15.2(4)e3)
• cisco / ios (versions: 15.2(5)e)
• cisco / ios (versions: 15.2(5)e1)
• cisco / ios (versions: 15.2(5a)e)
• cisco / ios (versions: 15.2(5b)e)

Weakness Classification

• NVD-CWE-noinfo
• Denial of Service Vulnerability
• CWE-noinfo Not enough information

Repositories for Lab Validation (Public Examples)

• Ostorlab/KEV | stars: 608 | updated: 2026-03-23 | https://github.com/Ostorlab/KEV
  Notes: Ostorlab KEV: One-command to detect most remotely known exploitable vulnerabilities. Sourced from CISA KEV, Google's Tsunami, Ostorlab's Asteroid and Bug Bounty programs.
• 7h3rAm/writeups | stars: 178 | updated: 2026-02-28 | https://github.com/7h3rAm/writeups
  Notes: Writeups for vulnerable machines.
• 7hang/cyber-security-interview | stars: 1 | updated: 2025-04-16 | https://github.com/7hang/cyber-security-interview
  Notes: ...

People and Organizations Mentioned

• cisco
• IOS and IOS XE Software
• Ostorlab
• 7h3rAm
• 7hang

Practical Defensive Validation (Authorized Only)

1. Use only isolated environments and systems you own or are explicitly authorized to test.
2. Snapshot infrastructure before validation and preserve baseline logs (EDR, SIEM, OS, app).
3. Inventory cisco / ios (versions: 15.2(3)e) assets and confirm exact vulnerable versions with automated checks.
4. Patch in staged environments and validate closure with scanners + service health checks.
5. Map detections to MITRE ATT&CK tactics relevant to your environment and tune alert quality.

References

• NVD record: https://nvd.nist.gov/vuln/detail/CVE-2017-6663
• MITRE CVE record: https://www.cve.org/CVERecord?id=CVE-2017-6663
• CISA KEV Catalog: https://www.cisa.gov/known-exploited-vulnerabilities-catalog
• CISA KEV JSON feed: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json
• KEV notes: https://nvd.nist.gov/vuln/detail/CVE-2017-6663
• http://www.securityfocus.com/bid/99973
• http://www.securitytracker.com/id/1038999
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170726-anidos
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6663
• Repository example: https://github.com/Ostorlab/KEV
• Repository example: https://github.com/7h3rAm/writeups
• Repository example: https://github.com/7hang/cyber-security-interview

This content is for defensive security training and authorized validation only.