CVE-2021-1435 is a vulnerability in Cisco IOS XE
Published on March 24, 2021
Cisco IOS XE Software Web UI Command Injection Vulnerability
A vulnerability in the web UI of Cisco IOS XE Software could allow an authenticated, remote attacker to inject arbitrary commands that can be executed as the root user. This vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by sending a crafted request to the web UI of an affected device with arbitrary commands injected into a portion of the request. A successful exploit could allow the attacker to execute arbitrary commands as the root user.
Known Exploited Vulnerability
This Cisco IOS XE Web UI Command Injection Vulnerability is part of CISA's list of Known Exploited Vulnerabilities. Cisco IOS XE contains a command injection vulnerability in the web user interface that could allow a remote, authenticated attacker to inject commands that can be executed as the root user.
The following remediation steps are recommended / required by November 9, 2023: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Weakness Type
What is a Directory traversal Vulnerability?
The software uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the software does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
CVE-2021-1435 has been classified to as a Directory traversal vulnerability or weakness.
Products Associated with CVE-2021-1435
Want to know whenever a new CVE is published for Cisco IOS XE? stack.watch will email you.
Affected Versions
Cisco IOS XE Software Version n/a is affected by CVE-2021-1435Exploit Probability
EPSS (Exploit Prediction Scoring System) scores estimate the probability that a vulnerability will be exploited in the wild within the next 30 days. The percentile shows you how this score compares to all other vulnerabilities.