# 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 CP…

CVE record · `CVE-2017-12237`

- **Identifiers:** `CVE-2017-12237`
- **State:** Confirmed
- **Severity:** CVSS 7.5 High
- **Critical:** Yes: KEV
- **CNA:** cisco
- **Weakness (CWE):** [CWE-399](https://cwe.mitre.org/data/definitions/399.html)
- **Tags:** [CWE-399](https://agentprime.io/advisories/tag/cwe-399.md)
- **Technologies:** [Cisco IOS and IOS XE](https://agentprime.io/advisories/technology/cisco-ios-and-ios-xe.md)
- **Published:** 28 Sept 2017
- **Updated:** 12 Jan 2026
- **Reviewed by a person:** No

Published by the CVE Program (CNA: cisco) at 28 Sept 2017, 07:00 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

## Critical

Critical, because:

- In CISA’s KEV catalogue since 3 Mar 2022: it is known to be exploited.

How we decide what’s critical: <https://agentprime.io/advisories/critical.md>

## Affected products, as the CNA wrote them

- Vendor: Not given. Product: Cisco IOS and IOS XE.
  - affected: `Cisco IOS and IOS XE`

## Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

## Severity and exploitation

- 7.5 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H`, from ADP (CISA-ADP)

- **CISA KEV:** Listed since 3 Mar 2022: known to be exploited.
- **EPSS:** 0.071, the 94th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

This record came from the full history of the CVE Program, published 28 Sept 2017. New records show when each source confirmed them.

## Sources

- [CVE List: CVE-2017-12237](https://www.cve.org/CVERecord?id=CVE-2017-12237)
- [NVD: CVE-2017-12237](https://nvd.nist.gov/vuln/detail/CVE-2017-12237)

### References from the CNA

- <https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170927-ike> (confirm)
- <http://www.securitytracker.com/id/1039460> (vdb-entry, sectrack)
- <http://www.securityfocus.com/bid/101037> (vdb-entry, bid)

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.

## Check whether this affects you

This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it. Compare the affected versions above with what you run.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), `get_advisory` returns this record and `search_advisories` finds related ones. Setup: <https://agentprime.io/mcp.md>
- As JSON: <https://api.agentprime.io/v1/advisories/CVE-2017-12237>
- Everything that needs attention now: <https://agentprime.io/advisories/critical.md>

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The web page: <https://agentprime.io/advisories/CVE-2017-12237/>. Everything for agents: <https://agentprime.io/llms.txt>.