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CVE-2017-6663

Cisco IOS Software and Cisco IOS XE Software Denial-of-Service

6.5 MEDIUMActively exploited (CISA KEV)EPSS 2.12%
  1. Published7 Aug 2017
  2. Added to CISA KEV3 Mar 2022
  3. Remediation due24 Mar 2022
Actively exploited (CISA KEV)

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 denial-of-service (DoS).

Added to KEV: 3 Mar 2022Federal remediation due: 24 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.

CVSS 3.1 breakdown

Attack vectorAdjacent
Attack complexityLow
Privileges requiredNone
User interactionNone
ScopeUnchanged
ConfidentialityNone
IntegrityNone
AvailabilityHigh
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products

Cisco iOS15.2\(3a\)e · 15.2\(3a\)e1 · 15.2\(3\)e · 15.2\(3\)e1
Cisco iOS XE16.6.1 · 3.10.4s · 3.10.8as

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Frequently asked

Is CVE-2017-6663 being actively exploited?

Yes. CVE-2017-6663 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 3 Mar 2022.

How severe is CVE-2017-6663?

CVE-2017-6663 has a CVSS 3.1 base score of 6.5, rated medium. EPSS estimates a 2.12% probability of exploitation.

Which products are affected by CVE-2017-6663?

Affected products include Cisco iOS, Cisco iOS XE.

How do I fix CVE-2017-6663?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2017-6663 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, Secuno flags any affected asset as top-priority automatically. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.