CVE-2018-0159 Cisco CVE debrief

Who should care

Network, infrastructure, and security teams that manage Cisco IOS or Cisco IOS XE devices, especially systems using IKEv1 for VPN/IPsec connectivity or other exposed network services. Organizations with internet-facing Cisco edge devices should prioritize review and remediation.

Technical summary

The vulnerability is described as a denial-of-service condition in Cisco IOS and Cisco IOS XE Software related to Internet Key Exchange version 1. The source corpus does not include further technical details, so the safest defensive reading is that affected devices running IKEv1 should be identified and updated using vendor guidance. CISA’s KEV listing indicates observed exploitation risk in the wild.

Defensive priority

High. CISA has placed this CVE in the Known Exploited Vulnerabilities catalog and assigned a remediation due date of 2022-03-17 in the provided record.

Recommended defensive actions

• Apply updates per vendor instructions.
• Inventory Cisco IOS and Cisco IOS XE devices across the environment.
• Identify where IKEv1 is enabled or in use and prioritize those systems for review.
• Focus first on exposed, perimeter, and mission-critical network devices.
• Validate remediation status and document any compensating controls until updates are complete.

Evidence notes

This debrief is based only on the supplied CISA KEV source item and the official CVE/NVD links provided in the corpus. The source metadata names the vendor as Cisco, the product as IOS Software and Cisco IOS XE Software, the vulnerability as an IKEv1 denial-of-service issue, and marks it as a known exploited vulnerability with required action to apply updates per vendor instructions. The provided timeline shows 2022-03-03 as the KEV/source publication and modification date.

Official resources