CVE-2017-6663Cisco IOS Software and Cisco IOS XE Software Denial-of-Service Vulnerability

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.

6.5 MEDIUMEPSS 2.11%⚡ Known Exploited (CISA KEV)NVD: Analyzed

Last updated: 2026-06-17 01:22 UTC

OverviewCVSS details

6.5MEDIUMCVSS 3.1

Score source: NVD
NVD status: Analyzed
Published: Aug 7, 2017
Assigner: cisco

Affected

Cisco IOS and IOS XE

Versions: Cisco IOS and IOS XE

Exploitation

Public exploit: None listed
CISA KEV: Listed · Mar 3, 2022
KEV due date: Mar 24, 2022
Ransomware use: Unknown
SSVC: Exploitation active · Automatable no · Impact partial

EPSS · FIRST, scored Nov 7

2.11%chance of exploitation in 30 days

Higher than 81.95% of CVEs

CVSS 3.1 · NVD

6.5Medium

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

Attack vector: Adjacent
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality impact: None
Integrity impact: None
Availability impact: High

CVSS 2.0 · NVD

6.1Medium

AV:A/AC:L/Au:N/C:N/I:N/A:C

Attack vector: Adjacent network
Attack complexity: Low
Authentication: None
Confidentiality impact: None
Integrity impact: None
Availability impact: Complete

NVD status: Analyzed

Overview Affected Products References

NVD CVE.org

Overview

Severity

Score	Severity	Version	Vector String
6.5	MEDIUM	3.1NVD	CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
6.1	MEDIUM	2.0NVD	AV:A/AC:L/Au:N/C:N/I:N/A:C

CISA required action

⚡ Known exploited · remediation due Mar 24, 2022

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Details

CVE ID: CVE-2017-6663
Status: Analyzed
Assigner (CNA): cisco
Published: Aug 7, 2017
Last modified: 2026-06-17 01:22 UTC

Sources

Refreshed hourly from the sources above. Last fetched 2026-11-08 12:07 UTC.