CVE-2006-0677

telnetd in Heimdal 0.6.x before 0.6.6 and 0.7.x before 0.7.2 allows remote unauthenticated attackers to cause a denial of service (server crash) via unknown vectors that trigger a null dereference.

Published: 2006-02-14 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2006-0677 is rated Moderate Risk (62.1/100): CVSS High severity, with high exploitation likelihood (EPSS 7.88%, 91th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. High exploitation likelihood—assess exposure and prioritize 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-2006-0677

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 8.91% 7.88% -1.03%
2 2025-03-29 7.88% 8.91% +1.03%
3 2025-03-17 — 7.88% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2006-0677

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C 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:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2006-0677

OS Trackers for CVE-2006-0677

vendor priority summary link
debian not yet assigned CVE-2006-0677 not yet assigned priority: Debian including 1 source packages (heimdal), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2006-0677
ubuntu medium CVE-2006-0677 medium priority: Ubuntu including 1 source packages (heimdal), 4 status rows across 4 suites (dapper, edgy, feisty, upstream): released 3, needs-triage 1. https://ubuntu.com/security/CVE-2006-0677

Affected software / configurations for CVE-2006-0677

Vendor Product Version Raw CPE
kth heimdal 0.6.1 cpe:2.3:a:kth:heimdal:0.6.1:*:*:*:*:*:*:*
kth heimdal 0.6.2 cpe:2.3:a:kth:heimdal:0.6.2:*:*:*:*:*:*:*
kth heimdal 0.6.3 cpe:2.3:a:kth:heimdal:0.6.3:*:*:*:*:*:*:*
kth heimdal 0.6.4 cpe:2.3:a:kth:heimdal:0.6.4:*:*:*:*:*:*:*
kth heimdal 0.6.5 cpe:2.3:a:kth:heimdal:0.6.5:*:*:*:*:*:*:*
kth heimdal 0.7.1 cpe:2.3:a:kth:heimdal:0.7.1:*:*:*:*:*:*:*
kth heimdal 0.7.1.1 cpe:2.3:a:kth:heimdal:0.7.1.1:*:*:*:*:*:*:*
kth heimdal 0.7.1.2 cpe:2.3:a:kth:heimdal:0.7.1.2:*:*:*:*:*:*:*
kth heimdal 0.7.1.3 cpe:2.3:a:kth:heimdal:0.7.1.3:*:*:*:*:*:*:*

References for CVE-2006-0677

cvelogic Threat Intelligence