CVE-2018-0158
Cisco IOS and XE Software Internet Key Exchange Memory Leak Vulnerability
- High 8.6
- Exploited: added to CISA KEV 3 Mar 2022
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.
Key facts
- Published
- 28 Mar 2018
- Last changed
- 12 Jan 2026
- Assigned by
- cisco
- KEV added
- 3 Mar 2022
- KEV fix due
- 17 Mar 2022
- EPSS
- 7.19% likely to be exploited in the next 30 days, higher than 94.401% of CVEs (scores for 15 Nov 2026)
- SSVC (CISA)
- Exploitation: active; Automatable: yes; Technical impact: partial
Severity scores
Each score is shown as its source gave it. They are not averaged or merged.
- 8.6CVSS 3.1, Highfrom CISA (ADP container)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
What to do
- Apply updates per vendor instructions.CISA KEV required action
Historical context and remediation
This reference retains the original CVE publication date. A recent record update does not mean a new attack occurred.
No separately sourced impact summary is available on this page yet. Consult the description, version data and dated exploitation evidence.
Version statuses below come from the CNA. An “unaffected” version is not necessarily a currently supported release or proof of a patch date. EPSS is a dated risk estimate, not a count of historical attacks.
Affected products
| Vendor | Product | Versions |
|---|---|---|
| n/a | Cisco IOS and IOS XE |
|
Timeline
- 28 Mar 2018 Published
- 3 Mar 2022 Added to the CISA KEV catalogue