CVE-2025-59440 is a high-severity vulnerability affecting the USIM in multiple Samsung Mobile Processors, Wearable Processors, and Modem Exynos chipsets. This vulnerability allows improper handling of SIM card proactive commands, which can lead to a Denial of Service (DoS). The CVSS score for this vulnerability is 7.5, indicating a high level of severity that requires immediate attention from security teams.
The real-world risk associated with this vulnerability is significant, particularly for organizations relying on Samsung devices that utilize the affected Exynos firmware. Attackers may leverage this vulnerability to disrupt services, leading to potential financial losses, reputational damage, and operational downtime. Organizations should prioritize patching immediately to mitigate these risks.
Currently, there are no known public exploits or proof-of-concept (PoC) code available for this vulnerability, indicating that exploitation may not yet be widespread. However, due to the high CVSS score and the potential impact, organizations should remain vigilant and prepare for possible future exploitation.
Given the nature and potential impact of this vulnerability, organizations should address it in their priority patch cycle. Ensuring that all affected systems are updated is critical to maintaining a robust security posture.
Vulnerability Details
This vulnerability allows improper handling of SIM card proactive commands in Samsung's Exynos line of processors, including models Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 9110, W920, W930, W1000, and various modem chipsets. The CVSS score of 7.5 categorizes this as a high severity issue, highlighting the urgent need for remediation.
The exploitability of this vulnerability is classified as high, with potential consequences for availability. Organizations should take the necessary steps to apply patches and mitigate associated risks.
Technical Analysis
The root cause of CVE-2025-59440 stems from improper handling of SIM card proactive commands within the USIM component of the affected Samsung processors. The attack vector is network-based, indicating that an attacker could exploit this vulnerability remotely without requiring physical access to the device.
The attack complexity is assessed as low, meaning that no specialized knowledge or skills are necessary to exploit this vulnerability effectively. Furthermore, the vulnerability does not require any privileges, nor does it necessitate user interaction to trigger the exploit.
The impact on availability is high, as successful exploitation could lead to service outages for devices utilizing affected Exynos firmware. Confidentiality and integrity impacts are assessed as none, indicating that data leakage or unauthorized data manipulation is not a concern in this scenario.
Risk & Impact Analysis
The real-world deployment risk associated with CVE-2025-59440 includes potential service disruptions for a wide range of devices using the affected Exynos firmware. Organizations utilizing these devices should recognize the urgency of addressing this vulnerability to prevent the risk of significant operational downtime.
The blast radius for this vulnerability is substantial, affecting numerous devices across various sectors, potentially leading to widespread disruption. Given the high CVSS score, organizations should prioritize remediation efforts, especially if they utilize devices that are crucial to their operations.
Organizations should also consider implementing additional security controls and monitoring to detect any unusual behavior associated with the exploitation of this vulnerability, even in the absence of confirmed exploits.
Signal | Status |
|---|---|
Known Exploit | No |
Public PoC | No |
Actively Exploited | No |
Ransomware Use | No |
Affected Versions
The vulnerability affects various versions of Samsung Exynos firmware, including the following:
Exynos 980, 990, 850, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 9110, W920, W930, W1000, Modem 5123, Modem 5300, and Modem 5400. Organizations should ensure that all versions prior to vendor patch are updated.
Mitigation & Remediation
To mitigate the risks associated with CVE-2025-59440, organizations should apply the latest patches provided by Samsung for the affected Exynos firmware versions. Regular firmware updates are essential to protect against known vulnerabilities.
In cases where a patch is not immediately available, organizations may consider implementing network controls to limit exposure to potential attacks. Monitoring systems for unusual behavior can also provide an additional layer of security during the interim period.
For further guidance on improving security posture, organizations can refer to resources such as application security assessments to identify and remediate potential vulnerabilities.
Detection Guidance
Monitoring logs for indicators of exploitation is crucial for early detection. Organizations should track behavioral anomalies in network traffic related to SIM card commands and any unexpected service disruptions in devices utilizing affected firmware.
Network signatures that identify the specific patterns of exploitation, if developed, should be integrated into security monitoring systems to enhance detection capabilities.
AppSecure Threat Intelligence Insight
The long-term significance of CVE-2025-59440 lies in its indication of the risks associated with vulnerabilities in mobile processor firmware. As the reliance on mobile technology increases, understanding and addressing these vulnerabilities is paramount for organizations.
This vulnerability highlights the need for ongoing security assessments and proactive measures to mitigate risks. Security teams should prioritize their efforts on vulnerabilities that could lead to significant operational impacts.
For further exploration of effective security strategies, organizations can refer to our guide on penetration testing methodology, which offers insights into identifying and remediating vulnerabilities effectively.
Additionally, organizations can gain further understanding from our article on vulnerability management programs to ensure continuous improvement in their security posture.
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
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