CVE-2000-0546

Buffer overflow in Kerberos 4 KDC program allows remote attackers to cause a denial of service via the lastrealm variable in the set_tgtkey function.

Published: 2000-06-09 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2000-0546 is rated Moderate Risk (48.9/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 2.58%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2000-0546

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-03-30 3.17% 2.58% -0.59%
2 2025-03-29 2.58% 3.17% +0.59%
3 2025-03-17 — 2.58% —

Full EPSS history (6 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2000-0546

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2000-0546

OS Trackers for CVE-2000-0546

vendor priority summary link
redhat — — https://access.redhat.com/security/cve/CVE-2000-0546

Affected software / configurations for CVE-2000-0546

Vendor Product Version Raw CPE
cygnus_network_security_project cygnus_network_security — cpe:2.3:a:cygnus_network_security_project:cygnus_network_security:-:*:*:*:*:*:*:*
kerbnet_project kerbnet — cpe:2.3:a:kerbnet_project:kerbnet:-:*:*:*:*:*:*:*
mit kerberos < 4.0 cpe:2.3:a:mit:kerberos:*:*:*:*:*:*:*:*
mit kerberos 4.0 cpe:2.3:a:mit:kerberos:4.0:-:*:*:*:*:*:*
mit kerberos 4.0 cpe:2.3:a:mit:kerberos:4.0:patch10:*:*:*:*:*:*
mit kerberos_5 >= 1.0, <= 1.0.7 cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
mit kerberos_5 1.1 cpe:2.3:a:mit:kerberos_5:1.1:*:*:*:*:*:*:*
mit kerberos_5 1.1.1 cpe:2.3:a:mit:kerberos_5:1.1.1:*:*:*:*:*:*:*

References for CVE-2000-0546

cvelogic Threat Intelligence