CVE-2025-66369 is a high-severity vulnerability affecting several Samsung processors, including the Exynos 980, 990, 850, and others. This vulnerability allows for a Denial of Service (DoS) due to incorrect handling of 5G NR NAS registration accept messages. The CVSS score of 7.5 indicates a significant risk, as it can be exploited over a network with low complexity, requiring no user interaction.
Organizations utilizing affected Samsung devices should be aware that the incorrect processing of these messages can lead to service interruptions, impacting the availability of critical services. With a high CVSS score, this vulnerability poses a substantial risk to any organization relying on these devices for operations.
The urgency for defenders is heightened; organizations must prioritize remediation efforts immediately. Given that the vulnerability is currently classified as deferred, there is no immediate patch available, but awareness and preparation are crucial to mitigate potential impacts.
As of now, there are no confirmed public exploits or proof of concept available for this vulnerability, but the potential for future exploitation remains a concern for cybersecurity practitioners.
Organizations should remain vigilant and monitor for updates from Samsung regarding this issue.
Vulnerability Details
The vulnerability was discovered in the MM component of multiple Samsung Mobile Processors, including Exynos 980, 990, 850, and several others. The incorrect handling of 5G NR NAS registration accept messages contributes to a Denial of Service condition. The CVSS score of 7.5 indicates a high severity level, which necessitates immediate attention from organizations using these components.
This vulnerability is classified under CWE-770, which relates to the improper handling of protocol messages leading to service disruptions. It is imperative for affected organizations to take steps to address this vulnerability proactively.
Technical Analysis
The root cause of CVE-2025-66369 lies in the incorrect processing of 5G NR NAS registration accept messages, which can result in a Denial of Service. The attack vector is network-based, with a low attack complexity, and does not require any privileges or user interaction to exploit.
The availability impact is rated as high, meaning that attackers exploiting this vulnerability could effectively render services unavailable, leading to significant operational disruptions.
Risk & Impact Analysis
Risk to organizations includes potential service outages affecting end-users, which could result in reputational damage and financial losses. The blast radius for this vulnerability could be extensive, impacting various services relying on the affected processors.
With the current CVSS score of 7.5 and a lack of KEV classification, organizations should assess their exposure and take necessary actions to monitor systems and prepare for future patches.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
All versions prior to vendor patch are affected, specifically Samsung Mobile Processor, Wearable Processor, and Modem Exynos 980, 990, 850, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, W920, W930, W1000, Modem 5123, and Modem 5300.
Mitigation & Remediation
Organizations should regularly check for updates from Samsung regarding this vulnerability. Until a patch is made available, consider implementing network segmentation to limit exposure and mitigate potential service disruptions.
Further, organizations may benefit from engaging in penetration testing to identify any other potential vulnerabilities in their systems.
Detection Guidance
To detect potential exploitation of this vulnerability, organizations should monitor logs for abnormal registration messages and service interruptions. Behavioral anomalies, such as unexpected device reboots or connectivity issues, should also be investigated.
AppSecure Threat Intelligence Insight
Long-term significance of CVE-2025-66369 highlights the ongoing challenges in the security of mobile processors and their impact on device availability. It serves as a reminder for security teams to prioritize proactive vulnerability management and continuous security assessments.
Organizations should focus on strategic defensive measures, including regular updates and comprehensive security testing. For further reading on vulnerability management, see our article on vulnerability management practices and their integration into development lifecycles.
Additionally, our blog on penetration testing methodology can provide insights into effective security assessment strategies.
Finally, understanding the implications of vulnerabilities like CVE-2025-66369 is crucial for developing a robust security posture, as discussed in our article on VAPT testing services that highlight comprehensive assessment approaches.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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