What’s Vulnerable › Vulnerabilities

CVE-2015-6429

• Severity: medium (CVSS 5.0 v2.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.7% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2015-12-19 · updated 2026-06-17
• Weakness: CWE-19

Description

The IKEv1 state machine in Cisco IOS 15.4 through 15.6 and IOS XE 3.15 through 3.17 allows remote attackers to cause a denial of service (IPsec connection termination) via a crafted IKEv1 packet to a tunnel endpoint, aka Bug ID CSCuw08236.

Affected products

• Cisco IOS: 15.4(3)s, 15.5(1)s, 15.5(1)t, 15.5(2)s, 15.5(2)t, 15.5(3)m (+5)
• Cisco IOS XE: 3.15s.0, 3.15s.1, 3.15s.2, 3.16s.0, 3.16s.1, 3.17s.0 (+1)

References

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151218-ios
• http://www.securitytracker.com/id/1034505
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20151218-ios
• http://www.securitytracker.com/id/1034505

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