CVE-2023-53886

HIGH
Published Dec 15, 2025 Modified Dec 18, 2025 CWE-121 CWE-787

Description

Xlight FTP Server 3.9.3.6 contains a stack buffer overflow vulnerability in the 'Execute Program' configuration that allows attackers to crash the application. Attackers can trigger the vulnerability by inserting 294 characters into the program execution configuration, causing a denial of service condition.

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CVSS v3.1 Score

7.5
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness Type (CWE)

CWE-121 CWE-121
CWE-787 Out-of-bounds Write

Affected Products

Vendor Product
xlightftpd xlight_ftp_server

References

Frequently Asked Questions

What is CVE-2023-53886? +
Xlight FTP Server 3.9.3.6 contains a stack buffer overflow vulnerability in the 'Execute Program' configuration that allows attackers to crash the application. Attackers can trigger the vulnerability by inserting 294 characters into the program execution configuration, causing a denial of service condition. It has a CVSS v3.1 base score of 7.5 (HIGH).
How severe is CVE-2023-53886? +
CVE-2023-53886 has a CVSS v3.1 score of 7.5 out of 10, rated HIGH. This is a high-severity vulnerability that should be prioritized for patching.
What products are affected by CVE-2023-53886? +
CVE-2023-53886 affects products from xlightftpd, specifically: xlight_ftp_server. Check the affected products table above for specific version ranges.
How do I check if I'm vulnerable to CVE-2023-53886? +
You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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