CVE-2025-61607 in T8100
Summary
by MITRE • 12/01/2025
In nr modem, there is a possible system crash due to improper input validation. This could lead to remote denial of service with no additional execution privileges needed
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Analysis
by VulDB Data Team • 12/21/2025
The vulnerability identified as CVE-2025-61607 affects the nr modem component within telecommunications infrastructure, presenting a critical security risk that could result in system instability and service disruption. This issue stems from inadequate input validation mechanisms that fail to properly sanitize or verify data received by the modem's processing functions. The vulnerability exists within the modem's communication handling subsystem where incoming data streams are processed without sufficient validation checks, creating an attack surface that malicious actors can exploit to trigger system failures.
The technical flaw manifests when the nr modem receives malformed or unexpected input data that it cannot properly handle during processing operations. This improper validation allows attackers to craft specific input sequences that cause the modem to enter an unstable state, ultimately leading to a system crash or complete service interruption. The vulnerability operates at the protocol level where the modem's input handling functions lack robust error checking and boundary validation, making it susceptible to malformed data injection attacks that can overwhelm the system's processing capabilities.
From an operational perspective, this vulnerability presents a significant risk for network infrastructure providers and telecommunications operators who rely on these modems for critical communication services. The remote denial of service capability means that attackers can trigger system crashes from external network positions without requiring elevated privileges or complex exploitation techniques. This characteristic significantly increases the attack surface and makes the vulnerability particularly dangerous for mission-critical infrastructure where service availability is paramount. The impact extends beyond simple service disruption to potentially affect network reliability and customer satisfaction in telecommunications environments.
The vulnerability aligns with CWE-20, which describes improper input validation as a fundamental weakness in software security design. This weakness category encompasses various scenarios where input data is not adequately validated before processing, leading to system instability and potential exploitation. The attack pattern follows typical denial of service methodologies outlined in the MITRE ATT&CK framework under the T1499 category for network denial of service, where adversaries leverage system weaknesses to disrupt service availability. Organizations should implement immediate mitigations including input sanitization measures, enhanced validation protocols, and network segmentation to prevent unauthorized access to modem interfaces.
Recommended remediation strategies include deploying firmware updates from the vendor that address the input validation gaps, implementing network monitoring solutions to detect anomalous input patterns, and establishing robust access controls for modem management interfaces. Additionally, organizations should consider implementing intrusion detection systems that can identify potential exploitation attempts targeting this vulnerability. The security community should monitor for related vulnerabilities in similar modem implementations and ensure that network infrastructure components receive regular security assessments to prevent similar issues from emerging in other subsystems.