What’s Vulnerable › Vulnerabilities

CVE-2019-25681: Xlight FTP Server 3.9.1 SEH Overwrite Buffer Overflow

• Severity: high (CVSS 7.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2026-04-05 · updated 2026-07-24
• Weakness: CWE-787

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.

Affected products

• Xlightftpd Xlight FTP Server: 3.9.1

References

• https://www.exploit-db.com/exploits/46458
• https://www.vulncheck.com/advisories/xlight-ftp-server-seh-overwrite-buffer-overflow
• https://www.xlightftpd.com/download/xlight.zip
• https://www.xlightftpd.com/index.htm

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