Local information disclosure in Cisco IOS XR

Published: 2021-02-03
Risk Low
Patch available YES
Number of vulnerabilities 1
CVE ID CVE-2021-1128
Exploitation vector Local
Public exploit N/A
Vulnerable software
Cisco IOS XR
Operating systems & Components / Operating system


Security Advisory

This security advisory describes one low risk vulnerability.

1) Information disclosure

Risk: Low

CVSSv3.1: 4.8 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:U/RL:O/RC:C] [PCI]

CVE-ID: CVE-2021-1128

CWE-ID: CWE-200 - Information Exposure

Exploit availability: No


The vulnerability allows a local user to gain access to potentially sensitive information.

The vulnerability exists in the CLI parser of Cisco IOS XR Software due to insufficient application of restrictions during the execution of a specific command. A local user can gain unauthorized access to sensitive information on the system.


Install updates from vendor's website.

Vulnerable software versions

Cisco IOS XR: before 6.7.2, 6.7.3, 7.1.2, 7.1.3, 7.1.25, 7.2.1, 7.2.2, 7.2.12

CPE External links


Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.