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CVE-1999-1568

20
FAUCET Score

CVE-1999-1568 describes an off-by-one error in NcFTPd FTP server versions prior to 2.4.1. This vulnerability allows a remote attacker to trigger a denial of service by sending an overly long PORT command, causing the server to crash. Rated with a CVSS score of 7.5 (High), it is easily exploitable over the network with low attack complexity and no user interaction required, leading to high availability impact. There is currently no evidence of active exploitation, and no public exploit code or significant community discussion has been identified for this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
< 2.4.1CPE matchmatch criteria
cpe:2.3:a:ncftp:ncftpd_server:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
2.34%
Probability of exploitation in next 30 days
EPSS Percentile
81.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-25
Model: v2026.06.15
This CVE's current EPSS score of 0.0234 is in the 68th percentile among its peer group of 51,485 CVEs.

Social Chatter

No social media mentions found for this CVE.

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

marc.info
Mailing List
exchange.xforce.ibmcloud.com / vulnerabilities/1833
Third Party AdvisoryVDB Entry
securityfocus.com / archive/1/12699
Broken LinkThird Party AdvisoryVDB Entry