Samsung — CraftedSignal Threat Feed

Samsung Escargot Out-of-Bounds Write Vulnerability (CVE-2026-25207)

hello@craftedsignal.io — Mon, 13 Apr 2026 05:17:17 +0000

CVE-2026-25207 is an out-of-bounds write vulnerability affecting Samsung Open Source Escargot, specifically version 97e8115ab1110bc502b4b5e4a0c689a71520d335. This flaw allows attackers to potentially overwrite memory buffers, leading to denial of service or arbitrary code execution. The vulnerability arises due to insufficient bounds checking when handling specific data inputs within the Escargot software. Successful exploitation of this vulnerability could grant an attacker elevated privileges or control over the affected system. The severity of the vulnerability is rated as HIGH with a CVSS score of 7.4, indicating a significant risk to systems running vulnerable versions of Escargot.

Attack Chain

An attacker crafts a malicious input designed to trigger the out-of-bounds write.
The malicious input is sent to the vulnerable Escargot application. This could involve exploiting a network service that relies on Escargot for data processing.
Escargot processes the malicious input without proper bounds checking.
The lack of bounds checking allows the input to write data beyond the allocated buffer.
The out-of-bounds write overwrites adjacent memory regions, potentially corrupting program data or code.
The memory corruption leads to a crash or allows the attacker to overwrite critical function pointers.
If function pointers are successfully overwritten, the attacker gains control of program execution.
The attacker can execute arbitrary code with the privileges of the Escargot process.

Impact

Successful exploitation of CVE-2026-25207 can lead to arbitrary code execution with the privileges of the Escargot process. This can result in complete system compromise, data loss, or denial of service. Given the potential for remote code execution, this vulnerability poses a significant risk to systems utilizing the vulnerable Escargot version.

Recommendation

Apply the patch provided in the associated GitHub pull request to remediate the vulnerability. (https://github.com/Samsung/escargot/pull/1554)
Monitor systems for unexpected crashes or memory corruption events related to the Escargot process.
Implement input validation and sanitization measures to prevent malicious inputs from reaching the vulnerable code.

Samsung MagicINFO 9 Server Local Privilege Escalation via Incorrect Default Permissions (CVE-2026-25203)

hello@craftedsignal.io — Fri, 10 Apr 2026 02:16:02 +0000

CVE-2026-25203 describes a local privilege escalation vulnerability affecting Samsung MagicINFO 9 Server versions prior to 21.1091.1. The vulnerability stems from incorrect default permissions, which could allow a malicious actor with low-level access to elevate their privileges on the system. This could lead to unauthorized access to sensitive data, modification of system configurations, or even complete system compromise. The vulnerability was reported by Samsung TV & Appliance and impacts systems running the affected MagicINFO 9 Server software. Successful exploitation of this vulnerability allows an attacker to bypass security restrictions and execute arbitrary code with elevated privileges. Defenders should prioritize patching vulnerable systems to mitigate this risk.

Attack Chain

Attacker gains initial low-privilege access to the target system through legitimate means or exploiting a separate vulnerability.
Attacker identifies the incorrect default permissions on critical MagicINFO 9 Server files or directories.
Attacker leverages these incorrect permissions to modify configuration files or replace binaries with malicious ones.
Attacker restarts the MagicINFO 9 Server service, causing the modified configuration or malicious binaries to be loaded with elevated privileges.
The compromised MagicINFO 9 Server service executes the attacker’s code with SYSTEM or other high-level privileges.
Attacker uses the elevated privileges to install backdoors, create new privileged accounts, or exfiltrate sensitive data.
Attacker gains persistent control over the system and uses it as a pivot point for further attacks within the network.

Impact

Successful exploitation of CVE-2026-25203 allows a local attacker to escalate their privileges to SYSTEM, effectively gaining complete control over the affected Samsung MagicINFO 9 Server. This could lead to data breaches, system instability, and the potential for lateral movement within the network. The number of potential victims is unknown, but any organization utilizing vulnerable versions of Samsung MagicINFO 9 Server is at risk. The targeted sectors would be those that deploy digital signage solutions using the MagicINFO platform.

Recommendation

Upgrade Samsung MagicINFO 9 Server to version 21.1091.1 or later to patch CVE-2026-25203.
Implement the provided Sigma rule to detect suspicious process creation related to MagicINFO and privilege escalation attempts.
Monitor file and directory permissions within the MagicINFO installation directory for unexpected changes to detect potential exploit attempts.
Monitor logs for unauthorized access attempts or modifications to critical system files.

Samsung Exynos Wi-Fi Driver Use-After-Free Vulnerability (CVE-2025-54602)

hello@craftedsignal.io — Mon, 06 Apr 2026 20:16:20 +0000

CVE-2025-54602 is a use-after-free vulnerability affecting the Wi-Fi driver in Samsung Mobile Processor and Wearable Processor Exynos chipsets. This vulnerability impacts the following Exynos models: 980, 850, 1080, 1280, 1330, 1380, 1480, 1580, W920, W930, and W1000. The root cause is an improper synchronization on a global variable within the driver, leading to a potential use-after-free scenario. An attacker can exploit this vulnerability by triggering a race condition through concurrent invocation of an ioctl function from multiple threads. Successful exploitation can lead to memory corruption, arbitrary code execution, and ultimately, device compromise. This vulnerability poses a significant risk to devices using the affected Exynos chipsets, including smartphones and wearable devices.

Attack Chain

Attacker gains initial access to the target device, which could be through a malicious application installed by the user.
The malicious application creates multiple threads to concurrently access the Wi-Fi driver.
Each thread invokes the vulnerable ioctl function within the Wi-Fi driver.
Due to the lack of proper synchronization, a race condition occurs when accessing a global variable.
One thread frees the memory associated with the global variable, while another thread continues to access it.
The second thread attempts to use the freed memory, resulting in a use-after-free condition.
The use-after-free condition leads to memory corruption, potentially allowing the attacker to overwrite critical data structures.
The attacker leverages the memory corruption to gain arbitrary code execution within the context of the Wi-Fi driver, potentially leading to full device compromise.

Impact

Successful exploitation of CVE-2025-54602 can lead to a range of severe consequences. An attacker could potentially gain arbitrary code execution on the affected device. Given the wide deployment of Samsung devices using the vulnerable Exynos chipsets, the potential number of victims is significant. Impacted sectors include mobile communications, consumer electronics, and wearable technology. A successful attack could result in data theft, device bricking, or the installation of persistent malware.

Recommendation

Apply the security updates provided by Samsung that address CVE-2025-54602 on affected Exynos chipsets. Refer to the Samsung security update webpage for specific patch versions (https://semiconductor.samsung.com/support/quality-support/product-security-updates/cve-2025-54602/).
Monitor for unusual process creation originating from applications interacting with Wi-Fi functionalities using the Sigma rule provided below.
Implement runtime memory protection mechanisms to detect and prevent use-after-free vulnerabilities during the execution of applications and system services.

Samsung Exynos Processor Denial-of-Service Vulnerability (CVE-2025-57834)

hello@craftedsignal.io — Mon, 06 Apr 2026 20:16:20 +0000

CVE-2025-57834 is a denial-of-service vulnerability affecting a wide range of Samsung Exynos processors and modems, including the Exynos 980, 850, 990, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 1680, 9110, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400, and Modem 5410. The vulnerability stems from a lack of proper input validation, allowing a malicious actor to send crafted input that triggers a denial-of-service condition. This could potentially lead to device unresponsiveness, crashes, or other service disruptions. While the specific attack vector is not detailed in the source material, the broad range of affected devices suggests a widespread impact on Samsung products utilizing these components. This vulnerability was published on 2026-04-06.

Attack Chain

Attacker identifies a vulnerable Samsung device using an affected Exynos processor or modem.
Attacker crafts a malicious input specifically designed to exploit the input validation flaw. The exact nature of this input is unknown without further information from the vendor.
Attacker transmits the malicious input to the targeted component of the device. This transmission method is unspecified and could vary based on the specific component and attack vector.
The targeted component receives the malicious input without proper validation.
The component attempts to process the invalid input, leading to an unexpected error or fault.
The error or fault causes the component to malfunction or crash.
The malfunction or crash disrupts the normal operation of the device or service.
The device enters a denial-of-service state, becoming unresponsive or unusable until restarted or patched.

Impact

Successful exploitation of CVE-2025-57834 can lead to a denial-of-service condition on affected Samsung devices. This could manifest as device crashes, unresponsiveness, or the inability to perform essential functions. The wide range of affected Exynos processors and modems suggests a potentially large number of vulnerable devices. The impact would depend on the criticality of the device or service being affected, ranging from minor inconvenience to significant disruption for users.

Recommendation

Monitor network traffic and system logs for suspicious activity related to devices with the affected Exynos processors (Exynos 980, 850, 990, 1080, 2100, 1280, 2200, 1330, 1380, 1480, 2400, 1580, 2500, 1680, 9110, W920, W930, W1000, Modem 5123, Modem 5300, Modem 5400, and Modem 5410).
Deploy the Sigma rule to detect potential denial-of-service attempts targeting the vulnerable devices and tune for your environment.
Refer to Samsung’s security updates (https://semiconductor.samsung.com/support/quality-support/product-security-updates/) for specific patch information and apply the necessary updates as soon as they become available to remediate CVE-2025-57834.
Contact US-CERT ( [email protected] ) for incident response assistance and non-NVD related technical cyber security questions.

Samsung MagicINFO 9 Server Path Traversal Vulnerability (CVE-2024-7399)

hello@craftedsignal.io — Wed, 19 Jun 2024 12:00:00 +0000

A critical path traversal vulnerability, identified as CVE-2024-7399, affects Samsung MagicINFO 9 Server. This flaw could be exploited by an attacker to write arbitrary files to the server with system-level privileges. Successful exploitation could lead to a complete compromise of the MagicINFO server, potentially allowing attackers to execute arbitrary code, install backdoors, or manipulate data stored on the server. Given the potential for widespread impact, organizations utilizing MagicINFO 9 Server should prioritize patching or mitigating this vulnerability immediately. The vulnerability was added to the CISA Known Exploited Vulnerabilities (KEV) catalog, highlighting its active exploitation risk.

Attack Chain

The attacker identifies a vulnerable MagicINFO 9 Server instance exposed to the network.
The attacker crafts a malicious HTTP request containing a path traversal sequence (e.g., “../”) in a file upload or download parameter.
The server improperly processes the path, failing to sanitize the input and allowing the attacker to traverse outside the intended directory.
The attacker uses the path traversal vulnerability to write a malicious file (e.g., a web shell or executable) to a sensitive directory, such as the web server’s root directory or a startup folder.
The attacker executes the malicious file, gaining arbitrary code execution on the server with system privileges.
The attacker establishes a persistent backdoor for future access, potentially installing tools for lateral movement and privilege escalation.
The attacker leverages their system privileges to access sensitive data, modify system configurations, or launch further attacks against the internal network.

Impact

Successful exploitation of CVE-2024-7399 can lead to complete system compromise, potentially affecting all connected displays and content managed by the MagicINFO server. This could result in unauthorized access to sensitive data, disruption of digital signage operations, and the potential for further attacks against the organization’s internal network. The vulnerability has been added to the CISA KEV catalog, indicating active exploitation, and therefore a high risk of exploitation.

Recommendation

Apply the mitigations provided by Samsung as described in their security update (https://security.samsungtv.com/securityUpdates).
If mitigations are unavailable, discontinue use of the product, as suggested by CISA.
Monitor web server logs for suspicious requests containing path traversal sequences (e.g., “../”) targeting the MagicINFO server. Use the MagicINFO Path Traversal Attempt Sigma rule to detect such attempts in web server logs.
Implement strict input validation and sanitization for all file upload and download functionalities on the MagicINFO server.
Monitor for the creation of unexpected files in sensitive directories, such as web server root directories or system startup folders. Use the Suspicious File Creation in Web Directories Sigma rule to detect such activity.