CVE-2017-6663
Cisco IOS Software and Cisco IOS XE Software Denial-of-Service Vulnerability
- Medium 6.5
- Exploited: added to CISA KEV 3 Mar 2022
Description
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.
Key facts
- Published
- 7 Aug 2017
- Last changed
- 21 Oct 2025
- Assigned by
- cisco
- KEV added
- 3 Mar 2022
- KEV fix due
- 24 Mar 2022
- EPSS
- 2.117% likely to be exploited in the next 30 days, higher than 82.144% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: no; Technical impact: partial
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 6.5CVSS 3.1, Mediumfrom CISA (ADP container)
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | Cisco IOS and IOS XE |
|
Timeline
- 7 Aug 2017 Published
- 3 Mar 2022 CVE-2017-6663 added to CISA KEV
- 3 Mar 2022 Added to the CISA KEV catalogue