CVE-2001-0554

CVE-2001-0554 is a critical-severity vulnerability in Mit Kerberos with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 38% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-120.

Key facts

Description

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.

Frequently asked questions

What is CVE-2001-0554?
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.
How severe is CVE-2001-0554?
CVE-2001-0554 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2001-0554 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 38% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2001-0554?
CVE-2001-0554 primarily affects Mit Kerberos. In total, 87 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2001-0554?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2001-0554 published?
CVE-2001-0554 was published on 2001-08-14 and last updated on 2026-06-16.

References

Affected products (87)

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