Medium 6.5Known exploited (CISA KEV)Published Aug 7, 2017

CVE-2017-6663A 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…

Updated under an hour ago (2026-10-19 06:10 UTC)

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It affects cisco ios and 1 other product. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Mar 3, 2022; federal agencies had to remediate by Mar 24, 2022. Treat that date as your deadline.

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Exploited in the last 30 days

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.

CVSS: 6.5 MEDIUM (v3.1, CISA ADP)CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Weakness (CWE): Not given
Known exploited: Added to CISA KEV Mar 3, 2022; federal remediation due Mar 24, 2022Apply updates per vendor instructions.
EPSS (exploitation in the next 30 days): 2.12% (percentile 82)
Assigned by: cisco
NVD analysis: Analyzed
Record last updated: Oct 21, 2025
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

cisco ios cisco:ios	15.2(3)e; 15.2(3)e1; 15.2(3)e2; 15.2(3)e3; 15.2(3)e4; 15.2(3)e5; 15.2(3a)e; 15.2(3a)e1; and 109 more ranges	NVD
cisco ios_xe cisco:ios_xe	3.7.0e; 3.7.1e; 3.7.3e; 3.8.0e; 3.8.0ex; 3.8.1e; 3.8.2e; 3.8.3e; and 61 more ranges	NVD

References

http://www.securitytracker.com/id/1038999vdb-entry, x-refsource-sectrack, broken-link, third-party-advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170726-anidosx-refsource-confirm, vendor-advisory
http://www.securityfocus.com/bid/99973vdb-entry, x-refsource-bid, broken-link, third-party-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2017-6663us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.