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Fencer Vulns
medium 5.0

CVE-2006-6751 json

Format string vulnerability in XM Easy Personal FTP Server 5.2.1 allows remote attackers to cause a denial of service (application crash) v…

published 2006-12-27 19 y ago modified 2026-06-16 4 mo ago also EUVD-2006-6734

cvss
5.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
3.4%
EPSS 3.4% chance of exploitation in 30 days, percentile 88%
public exploits
1
Exploit-DB

Summary

Format string vulnerability in XM Easy Personal FTP Server 5.2.1 allows remote attackers to cause a denial of service (application crash) via format string specifiers in the USER command or certain other available or nonexistent commands. NOTE: It was later reported that 5.3.0 is also vulnerable.

Timeline

  1. First public exploit (EDB-2978)
  2. Published

Exploit prediction

3.36% chance of exploitation in the next 30 days, higher than 88% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-2978 XM Easy Personal FTP Server 5.2.1 - 'USER' Format String Denial of Service dos, 2006-12-22
  • downloads.securityfocus.com http://downloads.securityfocus.com/vulnerabilities/exploits/18632.txt referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/bid/18632 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P

Classification

Weakness
  • CWE-134 Use of Externally-Controlled Format String

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.