Xlight FTP Server 3.9.3.6 Stack Buffer Overflow Vulnerability via Execute Program
Priority MEDIUM 56CWE-121Published · Updated
Key facts
- Attack vector
- Local
- Privileges required
- Low
- User interaction
- Active
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-121 and the CVSS impact.
Summary
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.
Why it matters now
Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00425 36th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA and NVD
Fix No fix listed No fixed version in the sources yet
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- No
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Xlightftpd | Xlight FTP Server | 3.9.3.6 | — | No fix listed | CNA |
- Xlight FTP Server VendorXlightftpd Affected 3.9.3.6 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:xlightftpd:xlight_ftp_server:3.9.3.6:*:*:*:*:*:*:* | 3.9.3.6 | Vulnerable | Xlightftpd |
- cpe:2.3:a:xlightftpd:xlight_ftp_server:3.9.3.6:*:*:*:*:*:*:* Versions 3.9.3.6 Vulnerable ·Xlightftpd
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2023-53886
- 2026-10-03 Alias added: GHSA-hxpr-5v98-mw59
References
Exploit 1
Advisory 1
More Xlightftpd Xlight Ftp Server vulnerabilities
- TI-2024-00677 Xlightftpd Xlight FTP Server Login denial of service CVSS 3.1HIGH 7.5
- TI-2019-15734 Xlight FTP Server 3.9.1 SEH Overwrite Buffer Overflow CVSS 4.0HIGH 8.6
- TI-2009-04551 Multiple SQL injection vulnerabilities in Xlight FTP Server before 3.2.1, when ODBC… CVSS 2.0MEDIUM 6.8
- TI-2010-02585 Directory traversal vulnerability in the SFTP/SSH2 virtual server in Xlight FTP Server… CVSS 2.0MEDIUM 6.5
Sources
- CVE-2023-53886 · CVE Program
- CVE-2023-53886 · NVD
- FIRST EPSS
- GHSA-hxpr-5v98-mw59 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences