Marco Wiorek

**Name of the Vulnerable Software and Affected Versions** Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT) (affected versions not specified) **Description** The issue is related to multiple vulnerabilities in the web-based management interface of the Cisco Catalyst PON Series Switches ONT. These vulnerabilities could allow an unauthenticated, remote attacker to log in with a default credential if the Telnet protocol is enabled, perform command injection, and modify the configuration. The vulnerability is also associated with insufficient input validation, which may allow a remote attacker to execute arbitrary commands. **Recommendations** For the Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT), consider disabling the Telnet protocol to prevent login with default credentials. As a temporary workaround, restrict access to the web-based management interface to minimize the risk of exploitation. Avoid using the web-based management interface until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

**Name of the Vulnerable Software and Affected Versions** Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT) (affected versions not specified) **Description** The issue is related to multiple vulnerabilities in the web-based management interface of the Cisco Catalyst PON Series Switches ONT. These vulnerabilities could allow an unauthenticated, remote attacker to log in with a default credential if the Telnet protocol is enabled, perform command injection, and modify the configuration. The vulnerability is also associated with insufficient input validation, which may allow a remote attacker to execute arbitrary code using a specially crafted HTTPS request. **Recommendations** For the Cisco Catalyst Passive Optical Network (PON) Series Switches Optical Network Terminal (ONT), consider disabling the Telnet protocol to prevent login with default credentials. As a temporary workaround, restrict access to the web-based management interface to minimize the risk of exploitation. Avoid using the web-based management interface until a patch is available. At the moment, there is no information about a newer version that contains a fix for this vulnerability.