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

CVE-2019-12659

Description

A vulnerability in the HTTP server code of Cisco IOS XE Software could allow an unauthenticated, remote attacker to cause the HTTP server to crash. The vulnerability is due to a logical error in the logging mechanism. An attacker could exploit this vulnerability by generating a high amount of long-lived connections to the HTTP service on the device. A successful exploit could allow the attacker to cause the HTTP server to crash.

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

Affected products

Cisco Systems, Inc./iOS Xe
cpe:2.3:o:cisco:ios_xe:16.10.1:*:*:*:*:*:*:*
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-httpserv-dosnvdVendor Advisory

News mentions

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