Is CVE-2007-4000 in the CISA KEV catalog?

No. CVE-2007-4000 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2007-4000?

CVE-2007-4000 has a CVSS v2 base score of 8.5 (HIGH).

What is the EPSS score for CVE-2007-4000?

CVE-2007-4000 has an EPSS score of 6.14% (93th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2007-4000?

Upgrade krb5 on debian 11 to 1.6.dfsg.1-7 or later.

CVE & CISA-KEV Catalog

CVE-2007-4000

HIGHEPSS 93th pctl

8.5

CVSS v2

NVD

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.

CWE-824

How to fix

Remediation Available

krb5Debian

Fixed in:1.6.dfsg.1-7CVE-2007-4000

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

6.14%probability of exploitation in 30 days

93rdpercentile

High risk: more likely to be exploited than 93% of all known CVEs.

References

Vendor Advisory1

web.mit.edu

Third-Party Advisory6

Issue Tracking1

bugzilla.redhat.com

Mailing List1

redhat.com

VDB Entry1

exchange.xforce.ibmcloud.com

Other references12

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.