CVE-2019-25681
HighCVSS 8.4Exploitation Probability (EPSS)
Low risk11th percentile - higher than 11% of all known CVEs
Summary
Xlight FTP Server 3.9.1 has an SEH overwrite vulnerability allowing local attackers to crash the application and overwrite SEH pointers via a crafted 428-byte payload in the program execution field of virtual server configuration.
Risk Assessment
A local attacker can crash the FTP server or potentially execute code, leading to system compromise.
Recommendation
Upgrade Xlight FTP Server to the latest version or apply available patch.
Other vulnerabilities in Xlight FTP Server
See all- CVE-2026-67191Critical
Xlight FTP Server before version 3.9.5 has a pre-authentication heap buffer overflow vulnerability. A remote unauthenticated attacker can send a malformed SSH client identification string to write past the end of a heap buffer. A logic error in the recv loop enables exploitation before authentication.
- CVE-2026-67193Medium
Xlight FTP Server before version 3.9.5 discloses the GetTickCount() value to unauthenticated attackers by sending a USER command with a username ending in :adm. Attackers can trigger the admin protocol path within the standard FTP listener pre-authentication, leaking timing information from the FTP 331 response.
- CVE-2026-67192High
Xlight FTP Server before version 3.9.5 contains a pre-authentication stack buffer overflow vulnerability. An unauthenticated attacker can send malformed SSH packets with GCM cipher negotiation, leading to stack corruption and potentially remote code execution.
Original NVD description (English source)
Xlight FTP Server 3.9.1 contains a structured exception handler (SEH) overwrite vulnerability that allows local attackers to crash the application and overwrite SEH pointers by supplying a crafted buffer string. Attackers can inject a 428-byte payload through the program execution field in virtual server configuration to trigger a buffer overflow that corrupts the SEH chain and enables potential code execution.