CVE-2019-25681CWE-787

Xlight FTP Server 3.9.1 SEH Overwrite Buffer Overflow

High · published April 5, 2026

CVSS v4.0
8.6
EPSS
0%
Percentile
10.4
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v4.0
8.6 · HIGH
Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
EPSS
0.00208 · 10.4th percentile
Weakness
CWE-787 · Out-of-bounds Write
Published
2026-04-05T20:45Z
EPSS history
Timeline
  • 05 APR 20:45Z
    Xlight FTP Server 3.9.1 SEH Overwrite Buffer Overflow
    cvelistv5