How severe is CVE-2007-4000?

CVE-2007-4000 has a CVSS 2.0 base score of 8.5, rated high severity.

Is CVE-2007-4000 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2007-4000?

CVE-2007-4000 primarily affects Mit Kerberos 5. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2007-4000?

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-2007-4000 published?

CVE-2007-4000 was published on 2007-09-05 and last updated on 2026-06-16.

CVE-2007-4000

CVE-2007-4000 is a high-severity vulnerability in Mit Kerberos 5 with a CVSS 2.0 base score of 8.5. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-824.

Key facts

Severity: High (CVSS 2.0 base score 8.5)
EPSS exploit prediction: 6% (93rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-824
Affected product: Mit Kerberos 5
Published: 2007-09-05
Last modified: 2026-06-16

Description

The kadm5_modify_policy_internal function in lib/kadm5/srv/svr_policy.c in the Kerberos administration daemon (kadmind) in MIT Kerberos 5 (krb5) 1.5 through 1.6.2 does not properly check return values when the policy does not exist, which might allow remote authenticated users with the "modify policy" privilege to execute arbitrary code via unspecified vectors that trigger a write to an uninitialized pointer.

Frequently asked questions

What is CVE-2007-4000?: The kadm5_modify_policy_internal function in lib/kadm5/srv/svr_policy.c in the Kerberos administration daemon (kadmind) in MIT Kerberos 5 (krb5) 1.5 through 1.6.2 does not properly check return values when the policy does not exist, which might allow remote authenticated users with the "modify policy" privilege to execute arbitrary code via unspecified vectors that trigger a write to an uninitialized pointer.
How severe is CVE-2007-4000?: CVE-2007-4000 has a CVSS 2.0 base score of 8.5, rated high severity.
Is CVE-2007-4000 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 6% (93rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2007-4000?: CVE-2007-4000 primarily affects Mit Kerberos 5. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2007-4000?: 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-2007-4000 published?: CVE-2007-4000 was published on 2007-09-05 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:mit:kerberos_5:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:7:*:*:*:*:*:*:*

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