Medium severity6.5NVD Advisory· Published Oct 5, 2016· Updated Jun 17, 2026

CVE-2016-6423

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.

AI Insight

LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Cisco Systems, Inc./Cisco iOS2 versions
cpe:2.3:o:cisco:ios:15.5\(3\)m:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:ios:15.5\(3\)m:*:*:*:*:*:*:*
- (no CPE)range: 15.5(3)M
Cisco Systems, Inc./iOS Xellm-fuzzy

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20161005-ios-ikevnvdVendor Advisory
www.securityfocus.com/bid/93411nvd
www.securitytracker.com/id/1036955nvd

News mentions

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cvss	0.423
epss	0.001
exploit	0.000
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patch	0.000
ransomware	0.000