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CVE-2025-26780: Denial of Service Vulnerability in Samsung Mobile Processor and Modem

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Overview

The vulnerability CVE-2025-26780 is a serious security flaw found in Samsung Mobile Processor and Modem Exynos 2400 and Modem 5400. This vulnerability can cause a Denial of Service (DoS) attack, potentially compromising system security or causing data leakage. It is critical that this vulnerability is addressed promptly to prevent any potential damage.

Vulnerability Summary

CVE ID: CVE-2025-26780
Severity: High (CVSS: 7.5)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise or data leakage

Affected Products

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Product | Affected Versions

Samsung Mobile Processor Exynos 2400 | All Versions
Samsung Modem 5400 | All Versions

How the Exploit Works

The vulnerability works by sending a malformed PDCP packet to the target system. The Samsung Mobile Processor and Modem Exynos 2400 and Modem 5400 lack a length check for these packets. When a malformed packet is received, it causes the system to crash, leading to a Denial of Service (DoS) attack.

Conceptual Example Code

The following is a conceptual example of a malicious PDCP packet sent to exploit the vulnerability. This is not an actual code, but a representation of how a potential attack might occur.

# Pseudo command to send a malformed PDCP packet
send_packet --target target.example.com --port 1234 --packet "{ 'malformed_pdcp_packet': '...' }"

This packet, when processed by the vulnerable Samsung Mobile Processor and Modem, would cause a system crash leading to a Denial of Service. In some situations, it could also lead to system compromise or data leakage.

Mitigation Guidance

The primary mitigation for this vulnerability is to apply the vendor patch provided by Samsung. If the patch cannot be applied immediately, a temporary mitigation could be to use a Web Application Firewall (WAF) or Intrusion Detection System (IDS) to detect and block malformed PDCP packets.

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Disclaimer:

The information and code presented in this article are provided for educational and defensive cybersecurity purposes only. Any conceptual or pseudocode examples are simplified representations intended to raise awareness and promote secure development and system configuration practices.

Do not use this information to attempt unauthorized access or exploit vulnerabilities on systems that you do not own or have explicit permission to test.

Ameeba and its authors do not endorse or condone malicious behavior and are not responsible for misuse of the content. Always follow ethical hacking guidelines, responsible disclosure practices, and local laws.

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