Buffer overflow in Xlightftpd Xlight
CVE-2019-25681
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.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.4 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.002 (10.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 10th percentile — 10.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000
Affected products
- Xlightftpd Xlight — versions 3.9.1
- Xlightftpd Xlight FTP Server — versions 3.9.1
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/46458 (Exploit, VDB Entry, exploit)
- www.xlightftpd.com/index.htm (Product, product)
- www.xlightftpd.com/download/xlight.zip (Product, product)
- www.vulncheck.com/advisories/xlight-ftp-server-seh-overwrite-buffer-overflow (Third Party Advisory, third-party-advisory)
Frequently asked questions
- What is CVE-2019-25681?
- CVE-2019-25681 is a high-severity vulnerability in Xlightftpd Xlight, classified under Out-of-bounds Write. CVSS score: 8.4/10. Published 2026-04-05.
- How severe is CVE-2019-25681?
- High severity. CVSS v3 base score is 8.4 out of 10.