Medium severity6.7NVD Advisory· Published Sep 25, 2019· Updated Jun 17, 2026

CVE-2019-12666

Description

A vulnerability in the Guest Shell of Cisco IOS XE Software could allow an authenticated, local attacker to perform directory traversal on the base Linux operating system of Cisco IOS XE Software. The vulnerability is due to incomplete validation of certain commands. An attacker could exploit this vulnerability by first accessing the Guest Shell and then entering specific commands. A successful exploit could allow the attacker to execute arbitrary code on the base Linux operating system.

AI Insight

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

Affected products

Cisco Systems, Inc./iOS Xe2 versions
cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*+ 1 more
- cpe:2.3:o:cisco:ios_xe:*:*:*:*:*:*:*:*range: >=16.4,<16.6.5
- cpe:2.3:o:cisco:ios_xe:16.11.1:*:*:*:*:*:*:*
Cisco Systems, Inc./IOS and IOS XE Softwarellm-fuzzy
Cisco Systems, Inc./IOS XE Software for Cisco Merakicpe-rescue
Range: unspecified

Patches

Vulnerability mechanics

References

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

News mentions

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