How severe is CVE-2006-6493?

CVE-2006-6493 has a CVSS 2.0 base score of 5.1, rated medium severity.

Is CVE-2006-6493 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2006-6493?

CVE-2006-6493 primarily affects Openldap. In total, 119 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2006-6493?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2006-6493 published?

CVE-2006-6493 was published on 2006-12-13 and last updated on 2026-06-16.

CVE-2006-6493

CVE-2006-6493 is a medium-severity vulnerability in Openldap with a CVSS 2.0 base score of 5.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Medium (CVSS 2.0 base score 5.1)
EPSS exploit prediction: 9% (95th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Openldap
Published: 2006-12-13
Last modified: 2026-06-16

Description

Buffer overflow in the krbv4_ldap_auth function in servers/slapd/kerberos.c in OpenLDAP 2.4.3 and earlier, when OpenLDAP is compiled with the --enable-kbind (Kerberos KBIND) option, allows remote attackers to execute arbitrary code via an LDAP bind request using the LDAP_AUTH_KRBV41 authentication method and long credential data.

Frequently asked questions

What is CVE-2006-6493?: Buffer overflow in the krbv4_ldap_auth function in servers/slapd/kerberos.c in OpenLDAP 2.4.3 and earlier, when OpenLDAP is compiled with the --enable-kbind (Kerberos KBIND) option, allows remote attackers to execute arbitrary code via an LDAP bind request using the LDAP_AUTH_KRBV41 authentication method and long credential data.
How severe is CVE-2006-6493?: CVE-2006-6493 has a CVSS 2.0 base score of 5.1, rated medium severity.
Is CVE-2006-6493 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 9% (95th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2006-6493?: CVE-2006-6493 primarily affects Openldap. In total, 119 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2006-6493?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2006-6493 published?: CVE-2006-6493 was published on 2006-12-13 and last updated on 2026-06-16.

References

Affected products (119)

cpe:2.3:a:openldap:openldap:*:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.0:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.0.1:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.0.2:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.0.3:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.1:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.1.0:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.1.1:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.1.2:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.1.3:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.1.4:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.0:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.1:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.2:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.3:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.4:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.5:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.6:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.7:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.8:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.9:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.10:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.11:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.12:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:1.2.13:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.0:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.1:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.2:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.3:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.4:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.5:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.6:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.7:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.8:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.9:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.10:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.11:*:*:*:*:*:*:*
cpe:2.3:a:openldap:openldap:2.0.11_9:*:*:*:*:*:*:*

More vulnerabilities in Openldap

CVE-2022-29155 — Critical (CVSS 9.8): In OpenLDAP 2.x before 2.5.12 and 2.6.x before 2.6.2, a SQL injection vulnerability exists in the experimental back-sql…
CVE-2010-0211 — Critical (CVSS 9.8): The slap_modrdn2mods function in modrdn.c in OpenLDAP 2.4.22 does not check the return value of a call to the…
CVE-2023-2953 — High (CVSS 7.5): A vulnerability was found in openldap. This security flaw causes a null pointer dereference in ber_memalloc_x()…
CVE-2020-25710 — High (CVSS 7.5): A flaw was found in OpenLDAP in versions before 2.4.56. This flaw allows an attacker who sends a malicious packet…
CVE-2020-25709 — High (CVSS 7.5): A flaw was found in OpenLDAP. This flaw allows an attacker who can send a malicious packet to be processed by…
CVE-2021-27212 — High (CVSS 7.5): In OpenLDAP through 2.4.57 and 2.5.x through 2.5.1alpha, an assertion failure in slapd can occur in the…

All CVEs affecting Openldap →