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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
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

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.

Official resources

CISA KEV listing date is 2022-03-03 and the due date in the supplied corpus is 2022-03-17. The CVE published and modified dates supplied are both 2022-03-03, and those dates are used here as the issue timeline context.