# CVE-2018-0158: Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerability

> CVE-2018-0158: Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerability. CVSS 8.6 (CVSS 3.1), in CISA KEV.

Canonical: https://rewindex.com/cve/CVE-2018-0158
Last updated: 2026-01-12T21:54:43Z

- Published: 2018-03-28 22:00 UTC · Updated: 2026-01-12 21:54 UTC · Assigner: cisco
- CVSS: 8.6 (CVSS 3.1) · Severity: High · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
- EPSS: 7.2%, 94th percentile (scored 2026-10-25)
- CISA KEV: yes, added 2022-03-03, federal due date 2022-03-17, ransomware use: Unknown
- CWE: CWE-20

## Description

A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause a memory leak or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to incorrect processing of certain IKEv2 packets. An attacker could exploit this vulnerability by sending crafted IKEv2 packets to an affected device to be processed. A successful exploit could cause an affected device to continuously consume memory and eventually reload, resulting in a DoS condition. Cisco Bug IDs: CSCvf22394.

## CISA required action

Apply updates per vendor instructions.

## Affected vendors and products

- n/a: Cisco IOS and IOS XE

## References

- [CVE record on cve.org](https://www.cve.org/CVERecord?id=CVE-2018-0158)
- [NVD entry](https://nvd.nist.gov/vuln/detail/CVE-2018-0158)
- [https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03](https://ics-cert.us-cert.gov/advisories/ICSA-18-107-03)
- [https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04](https://ics-cert.us-cert.gov/advisories/ICSA-18-107-04)
- [https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-ike](https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180328-ike)
- [http://www.securityfocus.com/bid/103566](http://www.securityfocus.com/bid/103566)
- [http://www.securitytracker.com/id/1040595](http://www.securitytracker.com/id/1040595)

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_Sources: CVE records from the CVE Program (cve.org). CVE® is a registered trademark of The MITRE Corporation. (https://www.cve.org/) This product uses data from the NVD API but is not endorsed or certified by the NVD. (https://nvd.nist.gov/) Known Exploited Vulnerabilities catalog from CISA. (https://www.cisa.gov/known-exploited-vulnerabilities-catalog) EPSS scores from FIRST (Exploit Prediction Scoring System). (https://www.first.org/epss/)_


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Canonical: https://rewindex.com/cve/CVE-2018-0158 · Markdown: https://rewindex.com/cve/CVE-2018-0158.md · JSON: https://rewindex.com/api/v1/cves/CVE-2018-0158 · Data licensed CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/) · Generated 2026-10-26T02:49:23.733Z