Finding Cisco devices running IOS XE
Cisco recently disclosed a command execution vulnerability that affects some versions of IOS XE SD-WAN software running on Cisco routing devices and virtual instances. With a CVSSv3 score of 7.8, this vulnerability (assigned CVE-2021-1529) is due to inadequate input validation in the command line interface (CLI), allowing an authenticated attacker who provides crafted CLI input to execute commands with root privileges. This vulnerability follows a handful of SD-WAN vulns Cisco has addressed this year.
Along with the disclosure, Cisco announced updated software to address this vulnerability. However, it is only for universal IOS XE releases and not standalone Cisco IOS XE SD-WAN releases. And with no mitigations or workarounds offered, folks should update affected devices and virtual instances as soon as possible.
_asset.protocol:snmp AND protocol:snmp AND snmp.sysDesc:"IOS-XE" AND (_asset.protocol:telnet or _asset.protocol:ssh)
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