How severe is CVE-2006-0677?

CVE-2006-0677 has a CVSS 2.0 base score of 7.8, rated high severity.

Is CVE-2006-0677 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-0677?

CVE-2006-0677 primarily affects Kth Heimdal. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-0677?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2006-0677 published?

CVE-2006-0677 was published on 2006-02-14 and last updated on 2026-06-16.

CVE-2006-0677

CVE-2006-0677 is a high-severity vulnerability in Kth Heimdal with a CVSS 2.0 base score of 7.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: High (CVSS 2.0 base score 7.8)
EPSS exploit prediction: 3% (86th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Kth Heimdal
Published: 2006-02-14
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is 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.
How severe is CVE-2006-0677?: CVE-2006-0677 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2006-0677 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (86th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-0677?: CVE-2006-0677 primarily affects Kth Heimdal. In total, 9 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-0677?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2006-0677 published?: CVE-2006-0677 was published on 2006-02-14 and last updated on 2026-06-16.

References

Affected products (9)

cpe:2.3:a:kth:heimdal:0.6.1:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.6.2:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.6.3:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.6.4:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.6.5:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.7.1:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.7.1.1:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.7.1.2:*:*:*:*:*:*:*
cpe:2.3:a:kth:heimdal:0.7.1.3:*:*:*:*:*:*:*

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CVE-2006-0582 — Low (CVSS 2.1): Unspecified vulnerability in rshd in Heimdal 0.6.x before 0.6.6 and 0.7.x before 0.7.2, when storing forwarded…

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