What’s Vulnerable › Vulnerabilities

CVE-2016-6381

• Severity: high (CVSS 7.5 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 3.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2016-10-05 · updated 2026-06-17
• Weakness: CWE-399

Description

Cisco IOS 12.4 and 15.0 through 15.6 and IOS XE 3.1 through 3.18 and 16.1 allow remote attackers to cause a denial of service (memory consumption or device reload) via fragmented IKEv1 packets, aka Bug ID CSCuy47382.

Affected products

• Cisco IOS: 12.4(15)t7, 12.4(15)t8, 12.4(15)t9, 12.4(15)t10, 12.4(15)t11, 12.4(15)t12 (+583)
• Cisco IOS XE: 3.1.0s, 3.1.1s, 3.1.2s, 3.1.3as, 3.1.4as, 3.1.4s (+99)
• Cisco Ios Xe 16.1: 16.1.2
• Cisco Ios Xe 3.3Sg: 3.3.0sg, 3.3.1sg, 3.3.2sg
• Cisco Ios Xe 3.3Xo: 3.3.0xo, 3.3.1xo
• Cisco Ios Xe 3.4Sg: 3.4.0sg, 3.4.1sg, 3.4.2sg, 3.4.3sg, 3.4.4sg, 3.4.5sg (+2)

References

• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-ios-ikev1
• http://www.securityfocus.com/bid/93195
• http://www.securitytracker.com/id/1036914
• http://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20160928-ios-ikev1
• http://www.securityfocus.com/bid/93195
• http://www.securitytracker.com/id/1036914

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