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PatchSiren cyber security CVE debrief

CVE-2018-0159 Cisco CVE debrief

CVE-2018-0159 is a Cisco IOS Software and Cisco IOS XE Software denial-of-service vulnerability affecting Internet Key Exchange version 1 (IKEv1). CISA includes it in the Known Exploited Vulnerabilities catalog, which means it should be treated as a remediation priority for environments running the affected Cisco platforms. The supplied CISA record directs teams to apply updates per vendor instructions.

Vendor
Cisco
Product
IOS Software and Cisco IOS XE Software
CVSS
Unknown
CISA KEV
Listed
Original CVE published
2022-03-03
Original CVE updated
2022-03-03
Advisory published
2022-03-03
Advisory updated
2022-03-03

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.

Sources and references

Verified primary and authoritative sources

  • CVE-2018-0159 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2018-0159

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2018-0159 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2018-0159

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

  • CISA Known Exploited Vulnerabilities catalog

    Publisher, destination, and source semantics verified

    URL: https://www.cisa.gov/known-exploited-vulnerabilities-catalog

    Cybersecurity and Infrastructure Security Agency - Official CISA catalog of vulnerabilities known to be exploited in the wild.

Supplemental references

  • Source item URL

    Unverified legacy reference

    URL: https://www.cisa.gov/sites/default/files/feeds/known_exploited_vulnerabilities.json

    cisa_kev

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.