CVE-2019-25628 in Download Accelerator Plus DAP
Summary
by MITRE • 03/24/2026
Download Accelerator Plus DAP 10.0.6.0 contains a structured exception handler buffer overflow vulnerability that allows remote attackers to execute arbitrary code by crafting malicious URLs. Attackers can create specially crafted URLs with overflowing buffer data that overwrites SEH pointers and executes embedded shellcode when imported through the application's web page import functionality.
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Analysis
by VulDB Data Team • 03/28/2026
The vulnerability identified as CVE-2019-25628 represents a critical buffer overflow flaw within Download Accelerator Plus DAP version 10.0.6.0 that stems from improper handling of structured exception handlers. This weakness exists within the application's web page import functionality, specifically when processing maliciously crafted URLs that contain overflowing buffer data. The vulnerability operates at the intersection of memory corruption and privilege escalation, creating a pathway for remote code execution that can be exploited without user interaction. The flaw demonstrates characteristics consistent with CWE-121, which describes stack-based buffer overflow conditions where insufficient bounds checking allows attackers to overwrite adjacent memory locations including structured exception handler records.
The technical exploitation of this vulnerability occurs through the manipulation of SEH (Structured Exception Handler) pointers during the URL import process. When the application processes a specially crafted URL containing oversized buffer data, the overflow corrupts the structured exception handler chain, allowing attackers to redirect execution flow to malicious shellcode embedded within the crafted payload. This technique leverages the application's failure to properly validate input lengths before processing web page imports, creating a condition where attacker-controlled data can overwrite critical memory structures. The vulnerability's remote nature means that exploitation can occur through web-based attacks without requiring local system access, making it particularly dangerous in enterprise environments where users may inadvertently encounter malicious URLs.
The operational impact of CVE-2019-25628 extends beyond simple code execution to encompass potential system compromise and data exfiltration capabilities. Attackers can leverage this vulnerability to establish persistent access to affected systems, escalate privileges, and deploy additional malware payloads through the downloaded accelerator plus application. The vulnerability affects any system running DAP version 10.0.6.0 or earlier, creating a significant attack surface that could be exploited across various network environments including corporate networks, public internet exposure, and user endpoint systems. This flaw aligns with ATT&CK technique T1059, which covers command and script interpreter execution, as the successful exploitation would enable attackers to execute arbitrary commands on compromised systems through the application's legitimate functionality.
Mitigation strategies for this vulnerability should prioritize immediate patching of affected DAP installations to version 10.0.6.1 or later, which contains the necessary memory boundary checks and structured exception handler protections. Network administrators should implement URL filtering and web application firewalls to block access to known malicious domains that may contain crafted URLs designed to exploit this vulnerability. Additional defensive measures include monitoring for suspicious import activities and implementing application whitelisting policies that restrict the execution of unauthorized software components. The vulnerability's classification as a remote code execution flaw makes it particularly susceptible to automated exploitation, necessitating proactive security controls including regular vulnerability assessments, network segmentation, and endpoint detection and response solutions to identify potential exploitation attempts. Organizations should also consider implementing security awareness training to reduce the risk of users inadvertently interacting with malicious URLs that could trigger this vulnerability.