CVE-2007-0956

CVE-2007-0956 is a critical-severity vulnerability in Mit Kerberos 5 with a CVSS 2.0 base score of 10.0. Its EPSS exploit-prediction score of 30% places it in the 98th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-306.

Key facts

Description

The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username beginning with a '-' character, a similar issue to CVE-2007-0882.

Frequently asked questions

What is CVE-2007-0956?
The telnet daemon (telnetd) in MIT krb5 before 1.6.1 allows remote attackers to bypass authentication and gain system access via a username beginning with a '-' character, a similar issue to CVE-2007-0882.
How severe is CVE-2007-0956?
CVE-2007-0956 has a CVSS 2.0 base score of 10.0, rated critical severity.
Is CVE-2007-0956 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 30% (98th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-0956?
CVE-2007-0956 primarily affects Mit Kerberos 5. In total, 6 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-0956?
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-2007-0956 published?
CVE-2007-0956 was published on 2007-04-06 and last updated on 2026-06-16.

References

Affected products (6)

More vulnerabilities in Mit Kerberos 5

All CVEs affecting Mit Kerberos 5 →

Other CWE-306 (Missing Authentication for Critical Function) vulnerabilities

Browse all CWE-306 (Missing Authentication for Critical Function) vulnerabilities →