CVE-2026-22319 in FL SWITCH 2005
Summary
by MITRE • 03/18/2026
A stack-based buffer overflow in the device's file installation workflow allows a high-privileged attacker to send oversized POST parameters that overflow a fixed-size stack buffer within an internal process, resulting in a DoS attack.
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Analysis
by VulDB Data Team • 03/22/2026
This vulnerability represents a critical stack-based buffer overflow flaw within the device's file installation workflow that fundamentally compromises system stability and availability. The vulnerability occurs when the internal process handling file installations fails to properly validate the size of incoming POST parameters, creating an exploitable condition where attacker-controlled data can exceed the allocated stack buffer boundaries. The flaw specifically manifests during the processing of oversized parameter data, where the fixed-size buffer cannot accommodate the excessive input, leading to memory corruption that disrupts normal system operations.
The technical implementation of this vulnerability follows a classic stack buffer overflow pattern where the device's web server or application layer processes user-supplied data without adequate bounds checking. When high-privileged attackers exploit this condition by sending POST parameters that exceed the predetermined buffer size, the excess data overflows into adjacent stack memory locations, potentially overwriting critical control data such as return addresses or function pointers. This memory corruption directly enables the attacker to manipulate program execution flow and achieve a denial of service condition that can render the device non-functional or cause unexpected behavior.
From an operational perspective, this vulnerability presents a significant risk to system availability and reliability, as successful exploitation results in denial of service attacks that can disrupt legitimate operations and potentially provide attackers with opportunities for further system compromise. The requirement for high-privileged access to exploit this vulnerability means that attackers must already have elevated credentials or system access, but the impact remains severe as it can be used to deny service to authorized users and potentially provide a foothold for additional attacks. The vulnerability affects the device's core installation workflow functionality, making it particularly dangerous in environments where device management and file operations are critical.
The attack surface for this vulnerability aligns with common application security weaknesses classified under CWE-121 stack-based buffer overflow, where insufficient input validation leads to memory corruption. This flaw also maps to ATT&CK technique T1499.004 for network denial of service, as the exploitation directly results in system unavailability. Organizations should implement immediate mitigations including input validation controls, stack protection mechanisms, and proper bounds checking of all user-supplied parameters. Additionally, implementing web application firewalls and rate limiting controls can help detect and prevent exploitation attempts. Regular security updates and code reviews should focus on identifying similar buffer overflow patterns throughout the application codebase to prevent similar vulnerabilities from emerging in other components.