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CVE-2021-34718

HIGH CVSS: 8.1 Published: 2021-09-09 Modified: 2026-06-17

Description

A vulnerability in the SSH Server process of Cisco IOS XR Software could allow an authenticated, remote attacker to overwrite and read arbitrary files on the local device. This vulnerability is due to insufficient input validation of arguments that are supplied by the user for a specific file transfer method. An attacker with lower-level privileges could exploit this vulnerability by specifying Secure Copy Protocol (SCP) parameters when authenticating to a device. A successful exploit could allow the attacker to elevate their privileges and retrieve and upload files on a device that they should not have access to.

Affected Platforms

Cisco Ncs 4016Cisco Ncs 5002Cisco Asr 9006Cisco Ncs 540 FronthaulCisco Ncs 5011Cisco Asr 9904Cisco Ncs 1001Cisco Ios Xrv 9000Cisco Asr 9010Cisco Asr 9000V-V2

Weakness Type

CWE-88, CWE-88

References