CVE-2001-0554

Kerberos vulnerability

CVSS

10.0

EPSS

37.9%

EPSS pct

98th

Exploited

No known

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.

Affected vendor

Mit

Affected product

Kerberos

CVSS vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Weakness type (CWE)

CWE-120 — Classic Buffer Overflow

Published

2001-08-14

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no authentication. Successful exploitation leads to complete impact to confidentiality, complete impact to integrity, complete impact to availability.

Its EPSS score of 37.9% reflects a moderate probability of exploitation activity in the wild over the next 30 days, placing it above 98% of all scored CVEs.

Check your external exposure to CVE-2001-0554

Confirm whether Mit Kerberos is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2001-0554.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2001-0554

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2001-0554 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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