High severity7.5NVD Advisory· Published Sep 25, 2019· Updated Jun 17, 2026

CVE-2019-12657

Description

A vulnerability in Unified Threat Defense (UTD) in Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause an affected device to reload. The vulnerability is due to improper validation of IPv6 packets through the UTD feature. An attacker could exploit this vulnerability by sending IPv6 traffic through an affected device that is configured with UTD. A successful exploit could allow the attacker to cause the device to reload, resulting in a denial of service (DoS) condition.

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Affected products

Cisco Systems, Inc./iOS Xe
cpe:2.3:o:cisco:ios_xe:16.3.6:*:*:*:*:*:*:*
Cisco Systems, Inc./IOS and IOS XE Softwarellm-fuzzy
Cisco Systems, Inc./Cisco IOS XE Softwarecpe-rescue
Range: unspecified

Patches

Vulnerability mechanics

References

tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190925-utdnvdVendor Advisory

News mentions

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