Stack-Based Buffer Overflow in SMA100 Series Web Interface by SonicWall

CVE-2025-40596

What is CVE-2025-40596?

CVE-2025-40596 is a critical vulnerability identified in the SMA100 series web interface developed by SonicWall, which is primarily utilized for secure remote access in network environments. This vulnerability manifests as a stack-based buffer overflow, allowing remote and unauthenticated attackers to exploit the system. The implications of this flaw can be severe, leading to potential denial of service (DoS) disruptions or even arbitrary code execution. Such outcomes could compromise the integrity and availability of critical network resources, making it imperative for organizations relying on SonicWall's SMA100 series to address this vulnerability swiftly.

Potential impact of CVE-2025-40596

1. Denial of Service (DoS): Exploitation of this vulnerability can result in service disruptions, rendering the SMA100 series inoperable and denying access to legitimate users, which can severely impact business operations.

2. Arbitrary Code Execution: Should an attacker successfully utilize this vulnerability, they may gain the ability to execute arbitrary code on the affected system, which poses a significant security threat, facilitating unauthorized access to sensitive data and administrative functionalities.

3. Increased Attack Surface: The existence of this vulnerability contributes to the overall attack surface of an organization, making it an attractive target for cybercriminals. Exploitation attempts could escalate, leading to further vulnerabilities being discovered and exploited in connected systems and services.

News Articles

Bitsight

CVE-2025-40596CVE-2025-40599

Akira Ransomware Exploits SonicWall SMA100 Vulnerabilities: What You Need to Know | Bitsight

New SonicWall SMA100 vulnerabilities (CVE-2025-40596 to CVE-2025-40599) could enable remote code execution—even on patched devices. While Akira ransomware activ

1 month ago

Hack Read

CVE-2025-40596

SonicWall Urges Patch After 3 Major VPN Vulnerabilities Disclosed

watchTowr details SonicWall SMA100 flaws (CVE-2025-40596, 40597, 40598). How pre-auth stack/heap overflows and XSS, put SSL-VPNs at risk.

Cyber Press

CVE-2025-40596CVE-2025-40597

Researchers Uncover N-day Vulnerabilities in SonicWall SMA100 Series

The vulnerabilities, disclosed on July 28, 2025, affect firmware version 10.2.1.15 and highlight persistent issues with HTTP header parsing in network security devices.

More News...

References