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A vulnerability in Cisco IOS XE Software for Cisco Meraki could allow a remote, unauthenticated attacker to view confidential device information.
 This vulnerability is due to a device configuration upload being performed over an insecure tunnel. An attacker could exploit this vulnerability by conducting an on-path attack between the affected device and the Cisco Meraki Dashboard. A successful exploit could allow the attacker to view sensitive device configuration information.

CVE-2026-20115 is a vulnerability identified in Cisco IOS XE Software specifically impacting Cisco Meraki devices. The root cause is the transmission of sensitive device configuration data in cleartext during configuration uploads, which are conducted over insecure tunnels. This insecure transmission allows a remote, unauthenticated attacker to perform an on-path attack—commonly known as a man-in-the-middle attack—between the affected device and the Cisco Meraki Dashboard. By intercepting this communication, the attacker can view confidential device configuration information, potentially exposing network topology, credentials, or other sensitive operational details. The vulnerability affects a broad range of IOS XE versions, from 17.14.1 up to 17.18.1a, indicating a wide window of exposure. The CVSS v3.1 base score is 6.1 (medium severity), reflecting that exploitation requires a high level of attack complexity and user interaction but no privileges or authentication. The scope is changed (S:C), meaning the vulnerability affects resources beyond the initially vulnerable component. There are no known exploits in the wild, and no patches or mitigation links were provided at the time of publication. This vulnerability primarily compromises confidentiality without affecting integrity or availability, but the exposure of sensitive configuration data could facilitate further attacks or unauthorized network access.

Detailed information about CVE-2026-20115: Cleartext Transmission of Sensitive Information in Cisco Cisco IOS XE Software affecting Cisco Cisco IOS XE Software.

CVE-2026-20115: Cleartext Transmission of Sensitive Information in Cisco Cisco IOS XE Software - Live Threat Intelligence - Threat Radar | OffSeq.com

CVE-2026-20115: Cleartext Transmission of Sensitive Information in Cisco Cisco IOS XE Software

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