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PatchSiren cyber security CVE debrief

CVE-2018-0158 Cisco CVE debrief

CVE-2018-0158 is a Cisco IOS Software and Cisco IOS XE Software Internet Key Exchange memory leak vulnerability. CISA added it to the Known Exploited Vulnerabilities catalog on 2022-03-03, indicating known exploitation and a required remediation window by 2022-03-17. The official guidance in the supplied corpus is to apply updates per vendor instructions.

Vendor
Cisco
Product
IOS Software and Cisco IOS XE Software
CVSS
HIGH 8.6
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

Administrators and operators responsible for Cisco IOS or Cisco IOS XE devices should prioritize this issue, especially where Internet Key Exchange functionality is in use or where devices are part of remote-access or site-to-site connectivity paths.

Technical summary

The vulnerability is identified in Cisco IOS and IOS XE Internet Key Exchange handling and is described as a memory leak. The supplied official sources do not include deeper technical mechanics, impact details, or a CVSS score, so the safest operational reading is that affected devices should be updated using Cisco’s vendor guidance.

Defensive priority

High. CISA KEV listing means this vulnerability is known to be exploited in the wild, and the catalog entry provides a due date for action. Treat remediation as urgent for any affected Cisco IOS/IOS XE systems.

Recommended defensive actions

  • Apply Cisco updates per vendor instructions.
  • Inventory Cisco IOS and IOS XE devices to determine exposure.
  • Prioritize remediation on internet-facing or operationally critical devices.
  • Confirm whether Internet Key Exchange features are enabled in affected environments.
  • Track completion against the CISA KEV due date of 2022-03-17.

Evidence notes

This debrief uses only the supplied official sources: the CISA KEV feed entry, the CVE record, and the NVD detail page. The corpus confirms the vulnerability name, affected Cisco product family, KEV listing, date added, and vendor-directed remediation. It does not provide a CVSS score, exploit chain details, or additional impact characterization.

Sources and references

Verified primary and authoritative sources

  • CVE-2018-0158 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2018-0158

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

  • CVE-2018-0158 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2018-0158

    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.