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Description

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.

PUBLISHED Reserved 2026-04-05 | Published 2026-04-05 | Updated 2026-04-06 | Assigner VulnCheck




HIGH: 8.6CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
HIGH: 8.4CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Problem types

Out-of-bounds Write

Product status

3.9.1
affected

Credits

Logan Whitmire finder

References

www.exploit-db.com/exploits/46458 (ExploitDB-46458) exploit

www.xlightftpd.com/index.htm (Official Product Homepage) product

www.xlightftpd.com/download/xlight.zip (Product Reference) product

www.vulncheck.com/...tp-server-seh-overwrite-buffer-overflow (VulnCheck Advisory: Xlight FTP Server 3.9.1 SEH Overwrite Buffer Overflow) third-party-advisory

cve.org (CVE-2019-25681)

nvd.nist.gov (CVE-2019-25681)

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