CVE-2018-0159

A vulnerability in the implementation of Internet Key Exchange Version 1 (IKEv1) functionality in Cisco IOS Software and Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to improper validation of specific IKEv1 packets. An attacker could exploit this vulnerability by sending crafted IKEv1 packets to an affected device during an IKE negotiation. A successful exploit could allow the attacker to cause an affected device to reload, resulting in a DoS condition. Cisco Bug IDs: CSCuj73916.

Data as of 2 Nov 2026 · NVD, CISA KEV, EPSS

Defenders still triage vulnerabilities one CVE at a time, while increasingly automated attackers combine them at machine speed. Omenwave models the plausible pathways by which this CVE could be chained with others — surfacing them for research and awareness, with evidence for each step.

Kill-chain stage

IMPACT

Requires

NONE access, NETWORK vector

Grants

NONE access (terminal impact)

Capabilities

denial of service

Model confidence

high · CVSS 3.1

No plausible forward hops are modelled from this CVE in the current corpus (it may be a terminal impact, or an independent entry point rather than a continuation).