Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability

ALTO 7.5EXPLOITED (CISA KEV)CVE-2016-6415 · Published 19/09/2016 · updated 17/06/2026

Cisco IOS, IOS XR, and IOS XE IKEv1 Information Disclosure Vulnerability. Actively exploited: CISA added this vulnerability to its Known Exploited Vulnerabilities catalog on 19/05/2023. Patch affected systems as an emergency.

Package	Affected versions	Patched versions
IOS, IOS XR, and IOS XE Cisco	Versions not published yet (product named by CISA KEV)

Description

The server IKEv1 implementation in Cisco IOS 12.2 through 12.4 and 15.0 through 15.6, IOS XE through 3.18S, IOS XR 4.3.x and 5.0.x through 5.2.x, and PIX before 7.0 allows remote attackers to obtain sensitive information from device memory via a Security Association (SA) negotiation request, aka Bug IDs CSCvb29204 and CSCvb36055 or BENIGNCERTAIN.

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160916-ikev1 · Vendor Advisory
securityfocus.com/bid/93003 · Third Party Advisory
securitytracker.com/id/1036841 · Third Party Advisory
cisa.gov/known-exploited-vulnerabilities-catalog · US Government Resource
CISA KEV · CVE-2016-6415

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