CVE-2021-1443
MEDIUMCisco IOS XE - Authenticated Remote Code Execution via Configuration File Tampering
Title source: llmDescription
A vulnerability in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker to execute arbitrary code with root privileges on the underlying operating system of an affected device. The vulnerability exists because the affected software improperly sanitizes values that are parsed from a specific configuration file. An attacker could exploit this vulnerability by tampering with a specific configuration file and then sending an API call. A successful exploit could allow the attacker to inject arbitrary code that would be executed on the underlying operating system of the affected device. To exploit this vulnerability, the attacker would need to have a privileged set of credentials to the device.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ios-xe-os-cmd-inj-Ef6TV5e9
Scores
CVSS v3
5.5
EPSS
0.0069
EPSS Percentile
71.9%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:H/A:N
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
no
Technical Impact
partial
Details
CWE
CWE-78
CWE-77
Status
published
Products (50)
cisco/ios_xe
16.9.1
cisco/ios_xe
16.9.1a
cisco/ios_xe
16.9.1b
cisco/ios_xe
16.9.1c
cisco/ios_xe
16.9.1d
cisco/ios_xe
16.9.1s
cisco/ios_xe
16.9.2
cisco/ios_xe
16.9.2a
cisco/ios_xe
16.9.2s
cisco/ios_xe
16.9.3
... and 40 more
Published
Mar 24, 2021
Tracked Since
Feb 18, 2026