CVE-2016-6415
Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability
Cisco · IOS, IOS XR, and IOS XE
Vulnerability details
Cisco IOS, IOS XR, and IOS XE contain insufficient condition checks in the part of the code that handles Internet Key Exchange version 1 (IKEv1) security negotiation requests. contains an information disclosure vulnerability in the Internet Key Exchange version 1 (IKEv1) that could allow an attacker to retrieve memory contents. Successful exploitation could allow the attacker to retrieve memory contents, which can lead to information disclosure.
Added to CISA KEV: 2023-05-19
Ransomware campaign use: Unknown
CISA due date: 2023-06-09
Defensive guidance from CISA
Apply updates per vendor instructions.
This is the source's required-action field, not an independently validated patch procedure. Refer to the vendor for exact affected versions and fixes.
Source catalog date: 2026-11-06T19:44:45.1797Z · Last retrieved: 2026-11-06 21:02:26 UTC