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Fencer Intel
critical 10.0

CVE-2010-4221 in the critical feed json

Multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c in ProFTPD before 1.3.3c allow remote attackers to ex…

published 16y ago modified 4mo ago also EUVD-2010-4195

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
91.3%
EPSS 91.3% chance of exploitation in 30 days, percentile 99.8%
public exploits
5
Metasploit and Exploit-DB

Summary

Multiple stack-based buffer overflows in the pr_netio_telnet_gets function in netio.c in ProFTPD before 1.3.3c allow remote attackers to execute arbitrary code via vectors involving a TELNET IAC escape character to a (1) FTP or (2) FTPS server.

Patch / fix

  • proftpd-dfsg Debian 14, Debian 13, Debian 12 1.3.3a-5

debian advisories DEBIAN-CVE-2010-4221

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Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2010-4221 updated cvss 7.5

proftpd: multiple stack-based buffer overflows in pr_netio_telnet_gets()

  • Red Hat All currently supported Red Hat products
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Timeline

  1. First public exploit (Metasploit exploit/freebsd/ftp/proftp_telnet_iac)
  2. Published

Exploit prediction

91.30% chance of exploitation in the next 30 days, higher than 99.8% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

CVSS scores

assigned by version score vector
NVD 2.0 10.0 AV:N/AC:L/Au:N/C:C/I:C/A:C

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel 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.