No exploitation reportedFix available

CVE-2020-36230

Q: Is CVE-2020-36230 actively exploited?

Active exploitation of CVE-2020-36230 has not been confirmed. Its EPSS score was 12.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

Q: What is the CVSS score for CVE-2020-36230?

CVE-2020-36230 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

No exploitation reported by the sources we read.

Published2021-01-26
Fixed in10.14.6
WeaknessCWE-617

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A flaw was discovered in OpenLDAP before 2.4.57 leading in an assertion failure in slapd in the X.509 DN parsing in decode.c ber_next_element, resulting in denial of service.

Timeline

dates in UTC

2021-01-2618:15CVE publishedNVD
2026-10-2319:23EPSS crossed 10 %FIRST EPSS

Observed activity

isMalicious corpus · updated 2026-10-23 18:48 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2020-36230?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2020-36230?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apple mac os x

Branch	Affected	Fixed in	Source
10.14	≥ 10.14.0, < 10.14.6	10.14.6	NVD
10.14	= 10.14.6	no fix published	NVD

Debian debian linux

Branch	Affected	Fixed in	Source
9.0	= 9.0	no fix published	NVD
10.0	= 10.0	no fix published	NVD

Apache bookkeeper

Branch	Affected	Fixed in	Source
4.12	= 4.12.1	no fix published	NVD

2 more products in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Vendor advisories

ICSA-21-341-01 CISA6 known affected
Hitachi Energy RTU500 OpenLDAP
RTU500 Series CMU: Firmware Version 12.6.X · RTU500 Series CMU: Firmware Version 13.0.X · RTU500 Series CMU: Firmware Version 13.2.1 · +3 more

Full record on NVD

Fix

Update Apple mac os x to 10.14.6
Mitigation from the vendor CISA ICSA-21-341-01 · 6 productsRTU500 series CMU: Firmware Versions 12.4.X to Version 12.4.11 (to be released by end of January 2022)
Mitigation from the vendor CISA ICSA-21-341-01 · 6 productsRTU500 series CMU: Firmware Versions 12.6.X to Version 12.6.7
Mitigation from the vendor CISA ICSA-21-341-01 · 6 productsRTU500 series CMU: Firmware Versions 12.7.X to Version 12.7.2
Mitigation from the vendor CISA ICSA-21-341-01 · 6 productsRTU500 series CMU: Firmware Versions 13.0.X to Version 13.2.3
Mitigation from the vendor CISA ICSA-21-341-01 · 6 productsRTU500 series CMU: Firmware Versions 13.1.X to Version 13.2.3
Mitigation from the vendor CISA ICSA-21-341-01 · 6 productsRTU500 series CMU: Firmware Versions 13.2.X to Version 13.2.3

Advisories and patches

bugs.openldap.orgVendor Advisory
git.openldap.orgPatch · Vendor Advisory
git.openldap.orgRelease Notes · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

Sources

NVDCVSS 3.17.5read 2026-10-23
NVDCVSS 2.05read 2026-10-23
NVDweakness (CWE)CWE-617read 2026-10-23
FIRST EPSSEPSS score12.1 %read 2026-10-23

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Published: 2021-01-26
Last Modified: 2026-10-14
NVD status: Modified

Frequently asked questions

What is CVE-2020-36230?

A flaw was discovered in OpenLDAP before 2.4.57 leading in an assertion failure in slapd in the X.509 DN parsing in decode.c ber_next_element, resulting in denial of service.

Is CVE-2020-36230 actively exploited?

Active exploitation of CVE-2020-36230 has not been confirmed. Its EPSS score was 12.1% on 2026-10-22, the estimated probability of exploitation in the next 30 days.

What is the CVSS score for CVE-2020-36230?

CVE-2020-36230 has a CVSS v3 base score of 7.5 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.

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