CVE-2020-36227

CVE-2020-36227 is a high-severity vulnerability in Openldap with a CVSS 3.x base score of 7.5. Its EPSS exploit-prediction score of 78% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-835.

Key facts

Description

A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancel_extop Cancel operation, resulting in denial of service.

Frequently asked questions

What is CVE-2020-36227?
A flaw was discovered in OpenLDAP before 2.4.57 leading to an infinite loop in slapd with the cancel_extop Cancel operation, resulting in denial of service.
How severe is CVE-2020-36227?
CVE-2020-36227 has a CVSS 3.x base score of 7.5, rated high severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability high.
Is CVE-2020-36227 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 78% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-36227?
CVE-2020-36227 primarily affects Openldap. In total, 4 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2020-36227?
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-2020-36227 published?
CVE-2020-36227 was published on 2021-01-26 and last updated on 2026-06-17.

References

Affected products (4)

More vulnerabilities in Openldap

All CVEs affecting Openldap →

Other CWE-835 (Loop with Unreachable Exit Condition (Infinite Loop)) vulnerabilities

Browse all CWE-835 (Loop with Unreachable Exit Condition (Infinite Loop)) vulnerabilities →