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Fencer Vulns
critical 10.0

CVE-2001-0554 in the critical feed json

Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute arbitrary commands via a…

published 2001-08-14 25 y ago modified 2026-06-16 4 mo ago also EUVD-2001-0546

cvss
10.0
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
38.7%
EPSS 38.7% chance of exploitation in 30 days, percentile 98%
public exploits
1
Exploit-DB

Summary

Buffer overflow in BSD-based telnetd telnet daemon on various operating systems allows remote attackers to execute arbitrary commands via a set of options including AYT (Are You There), which is not properly handled by the telrcv function.

Patch / fix

  • mit kerberos_5 1.2.2
  • mit krb5 1.2.2
  • freebsd freebsd 4.4

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-2001-0554 updated

security flaw

  • Red Hat Linux 5.2 Red Hat Linux 6.2 Red Hat Linux 7.0 Red Hat Linux 7.1
    fixed: vendor fix RHSA-2001:099

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 (EDB-21018)
  2. Published

Exploit prediction

38.75% chance of exploitation in the next 30 days, higher than 98% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • EDB-21018 Solaris 2.x/7.0/8 / IRIX 6.5.x / OpenBSD 2.x / NetBSD 1.x / Debian 3 / HP-UX 10 - 'TelnetD' Remote Buffer Overflow remote, 2001-07-18
  • securityfocus.com http://www.securityfocus.com/bid/3064 referenced PoC, tagged "exploit" by a source, unverified
  • securityfocus.com http://www.securityfocus.com/archive/1/197804 referenced PoC, tagged "exploit" by a source, unverified

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-120 Buffer Copy without Checking Size of Input

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.

CPEs and fixed versions use Anchore's correction of NVD's data: Improve kerberos 5 affected range consistency.