Public proof of conceptFix available

CVE-2024-46483

Q: What is CVE-2024-46483?

Xlight FTP Server <3.9.4.3 has an integer overflow vulnerability in the packet parsing logic of the SFTP server, which can lead to a heap overflow with attacker-controlled content.

Q: Is CVE-2024-46483 actively exploited?

A proof-of-concept exploit exists for CVE-2024-46483, but active exploitation has not been confirmed at this time.

Q: What is the CVSS score for CVE-2024-46483?

CVE-2024-46483 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

A public proof of concept exists; no exploitation attested.

Published2024-10-22
Fixed in3.9.4.3
WeaknessCWE-190

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

Xlight FTP Server <3.9.4.3 has an integer overflow vulnerability in the packet parsing logic of the SFTP server, which can lead to a heap overflow with attacker-controlled content.

Timeline

dates in UTC

2024-10-2222:15CVE publishedNVD
2026-10-2319:23First public proof of conceptPoC-in-GitHub

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2024-46483?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2024-46483?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

CISA-ADP

Xlightftpd xlight ftp server

Branch	Affected	Fixed in	Source
3.9	< 3.9.4.3	3.9.4.3	CISA-ADP

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Fix

Update Xlightftpd xlight ftp server to 3.9.4.3

Detection

read 2026-10-23 19:24 UTC

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: 1 repository, unverifiedkn32/cve-2024-46483

Sources

NVDCVE recordread 2026-10-23
CISA-ADPSSVC decisionpoc2024-10-23
OpenCVESSVC decisionpoc—
CISA-ADPCVSS 3.19.82024-10-23
CISA-ADPweakness (CWE)CWE-1902024-10-23
FIRST EPSSEPSS score1.1 %2026-10-23
PoC-in-GitHubproof of concept1read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Published: 2024-10-22
Last Modified: 2026-06-17
NVD status: Deferred

Frequently asked questions

What is CVE-2024-46483?

Xlight FTP Server <3.9.4.3 has an integer overflow vulnerability in the packet parsing logic of the SFTP server, which can lead to a heap overflow with attacker-controlled content.

Is CVE-2024-46483 actively exploited?

A proof-of-concept exploit exists for CVE-2024-46483, but active exploitation has not been confirmed at this time.

What is the CVSS score for CVE-2024-46483?

CVE-2024-46483 has a CVSS v3 base score of 9.8 (CRITICAL severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Hear about the next vulnerability in your software

Surveillance reads the versions in your stack — a domain, a lockfile or a list — checks each CVE against the ranges its sources publish, and alerts you when one you run is exploited or enters CISA KEV. A version it cannot read stays « version not verified ».

Get alerts for this product CISA KEV additions, October 2026 Search CVEs

No credit card required · No monthly cap on website lookups · 250 API requests/month

Go further

Following what attackers exploit right now? The CISA KEV additions of the month, with their patch deadlines.
Running this software? Vulnerability monitoring alerts you to new vulnerabilities in your products.

Related vulnerabilities

Same product first, then the same vendor advisory and the same publication week.

Back to CVE Database