CVE-2021-1381

A vulnerability in Cisco IOS XE Software could allow an authenticated, local attacker with high privileges or an unauthenticated attacker with physical access to the device to open a debugging console. The vulnerability is due to insufficient command authorization restrictions. An attacker could exploit this vulnerability by running commands on the hardware platform to open a debugging console. A successful exploit could allow the attacker to access a debugging console.

• CWE-489

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-BLKH-Ouvrnf2sVendor Advisory
• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-XE-BLKH-Ouvrnf2sVendor Advisory

Published

Mar 24, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-1375Multiple vulnerabilities in the fast reload feature of Cisco…6.7
• CVE-2021-1376Multiple vulnerabilities in the fast reload feature of Cisco…6.7
• CVE-2021-1377A vulnerability in Address Resolution Protocol (ARP) managem…5.8
• CVE-2021-1378A vulnerability in the SSH service of the Cisco StarOS opera…7.5
• CVE-2021-1379Multiple vulnerabilities in the Cisco Discovery Protoco…6.5
• CVE-2021-1380Multiple vulnerabilities in the web-based management interfa…6.1
• CVE-2021-1382A vulnerability in the CLI of Cisco IOS XE SD-WAN Software c…6.7
• CVE-2021-1383Multiple vulnerabilities in the CLI of Cisco IOS XE SD-WAN S…6.7
• CVE-2021-1384A vulnerability in Cisco IOx application hosting environment…7.2
• CVE-2021-1385A vulnerability in the Cisco IOx application hosting environ…6.5
• CVE-2021-1386A vulnerability in the dynamic link library (DLL) loading me…7.8
• CVE-2021-1387A vulnerability in the network stack of Cisco NX-OS Software…8.6