CVE-2016-6423

medium

Published 2016-10-05 · Modified 2026-05-06

CVSS v3

6.5

CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS v2

6.3

VIR risk

6.5

Description

The IKEv2 client and initiator implementations in Cisco IOS 15.5(3)M and IOS XE allow remote IKEv2 servers to cause a denial of service (device reload) via crafted IKEv2 packets, aka Bug ID CSCux97540.

Predictions

Exploit likelihood

75%

Patch ETA

—

Heuristic predictions, AS-IS, for prioritization only.

Mitigations

vendor Authored 2026-05-27

Vendor advisory: psirt@cisco.com — http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-ios-ikev

References

http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-ios-ikev
http://www.securityfocus.com/bid/93411
http://www.securitytracker.com/id/1036955
http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-ios-ikev
http://www.securityfocus.com/bid/93411
http://www.securitytracker.com/id/1036955

CWEs

CWE-399

Verify integrity in audit chain (admin only). AS-IS.