CVE-2025-71256

NR · Modem

A vulnerability in the NR modem component allows for improper input validation, which may lead to system instability or unauthorized behavior.

Executive summary

An improper input validation vulnerability in the NR modem component presents a high-risk security threat that demands immediate vendor-provided remediation.

Vulnerability

The flaw consists of improper input validation within the NR modem firmware. This type of vulnerability typically allows an attacker to exploit the interface by sending specifically crafted input to trigger memory corruption or logic errors.

Business impact

With a CVSS score of 7.5, this vulnerability represents a significant risk to the integrity of communication infrastructure. Successful exploitation could lead to unauthorized access or persistent denial-of-service, negatively impacting critical business communications.

Remediation

Immediate Action: Update the firmware of all NR modem devices to the latest version provided by the manufacturer.

Proactive Monitoring: Monitor device logs for signs of unexpected reboots or service failures that may indicate an attempt to exploit the input validation flaw.

Compensating Controls: Implement strict network access controls to limit communication with the modem interface to trusted endpoints only.

Exploitation status

Public Exploit Available: false

Analyst recommendation

Firmware security is critical for hardware-level components. Organizations should prioritize updating all NR modem devices to ensure they are protected against this input validation vulnerability.