Reference page — cumulative record through Thursday, October 8, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC PR UI S C I A CVSS EPSS %ile KEV N L N N U N N H 7.5 .0707 94.1 YES
AFFECTED Product Versions Fixed Cisco IOS and IOS XE Cisco IOS and IOS XE – —
TIMELINE Aug 3 Reserved by cisco Sep 28 Published (CNA: cisco) Mar 3 Added to CISA KEV, remediation due 2022-03-24
A vulnerability in the Internet Key Exchange Version 2 (IKEv2) module of Cisco IOS 15.0 through 15.6 and Cisco IOS XE 3.5 through 16.5 could allow an unauthenticated, remote attacker to cause high CPU utilization, traceback messages, or a reload of an affected device that leads to a denial of service (DoS) condition. The vulnerability is due to how an affected device processes certain IKEv2 packets. An attacker could exploit this vulnerability by sending specific IKEv2 packets to an affected device to be processed. A successful exploit could allow the attacker to cause high CPU utilization, traceback messages, or a reload of the affected device that leads to a DoS condition. This vulnerability affects Cisco devices that have the Internet Security Association and Key Management Protocol (ISAKMP) enabled. Although only IKEv2 packets can be used to trigger this vulnerability, devices that are running Cisco IOS Software or Cisco IOS XE Software are vulnerable when ISAKMP is enabled. A device does not need to be configured with any IKEv2-specific features to be vulnerable. Many features use IKEv2, including different types of VPNs such as the following: LAN-to-LAN VPN; Remote-access VPN, excluding SSL VPN; Dynamic Multipoint VPN (DMVPN); and FlexVPN. Cisco Bug IDs: CSCvc41277.
| Date | Event | Detail |
|---|---|---|
| August 3, 2017 | Reserved | Reserved by cisco |
| September 28, 2017 | Published | Published (CNA: cisco) |
| March 3, 2022 | KEV ADDED | Added to CISA KEV, remediation due 2022-03-24 |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| n/a | Cisco IOS and IOS XE | — | Cisco IOS and IOS XE | — |
Authoritative record: CVE-2017-12237 at cve.org
Weaknesses: CWE-399
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2017-12237 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Thursday, October 8, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
