CVE-2020-36228

CRITICALNVD 7.59.0
EchelonGraph scoreHIGH confidence

“▲” beside the score: it is higher than NVD's CVSS score.

Score elevated to 9.0 because EPSS predicted 85% probability of exploitation within the next 30 days (99th percentile of EPSS-scored CVEs) when EchelonGraph scored this CVE. NVD baseline CVSS 7.5 retained for reference. Confidence: see factors.

Triggered by: EPSS exploit prediction (continuous uplift above 30%)
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated

Also known asEUVD-2020-23773 (ENISA EUVD) · GHSA-46gp-cxcx-7c88 (GitHub Security Advisories)Source: ENISA EUVD

9.0EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High exploitation likelihood — EPSS 85%
CISA-KEV: Not listedEPSS PROB: 85%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, resulting in denial of service.

CVSS v3
7.5
EG Score
9.0CRITICALhigh confidence
EG Risk
68
EG Risk 68/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation85% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's BOD 26-04 default: no one has published Automatable for this CVE, and CISA treats it as “no” for a CVE not in KEV.
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines.
EPSS PROB
85%
EPSS %ILE
99th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.0): severity, escalated by confirmed exploitation. This CVE's 9.0 is EPSS's lift toward 9.0 from its impact severity (EG Severity, CVSS 7.5 HIGH): a likelihood of exploitation, not impact.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
85% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-11-12). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source, and whom BOD 26-04 binds: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines.

Exploitation none (no CISA value, KEV listing or exploit code on record) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). EchelonGraph holds no SSVC assessment of this CVE from CISA: none of these inputs is from Vulnrichment. EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA's BOD 26-04 default) · Technical impact total (CISA's BOD 26-04 default). Where an input reads “CISA's BOD 26-04 default”, no one has published it for this CVE, and CISA's implementation guidance says: “If “Automatable” and “Technical Impact” information items about a CVE ID are not available and the CVE ID is not in the KEV Catalog, CISA will treat its values as “no” and “total,” respectively, until CISA or a third party provides metadata about the CVE ID. CISA will always provide the Vulnrichment data for a CVE ID listed in the KEV Catalog.” Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

January 26, 2021

Last Modified

October 14, 2026

Advisory Details (9)

Auto-updated Oct 14, 2026
Patch available.
Web page

Full Disclosure: APPLE-SA-2021-05-25-2 macOS Big Sur 11.4

http://seclists.org/fulldisclosure/2021/May/70
Web page

About the security content of Security Update 2021-003 Catalina - Apple Support

https://support.apple.com/kb/HT212530
Web page

About the security content of Security Update 2021-004 Mojave - Apple Support

https://support.apple.com/kb/HT212531
Web page

About the security content of macOS Big Sur 11.4 - Apple Support

https://support.apple.com/kb/HT212529
Web pageMentions a patch (unverified)

[SECURITY] [DLA 2544-1] openldap security update

https://lists.debian.org/debian-lts-announce/2021/02/msg00005.html
Web page

ITS#9427 fix issuerAndThisUpdateCheck (91dccd25) · Commits · openldap / OpenLDAP · GitLab

https://git.openldap.org/openldap/openldap/-/commit/91dccd25c347733b365adc74cb07d074512ed5ad
Web page

9427 – Integer underflow causes segfault in OpenLDAP: slapd v2.X - schema_init.c:issuerAndThisUpdateCheck:3932

https://bugs.openldap.org/show_bug.cgi?id=9427
Web page

OPENLDAP_REL_ENG_2_4_57 · Tags · openldap / OpenLDAP · GitLab

https://git.openldap.org/openldap/openldap/-/tags/OPENLDAP_REL_ENG_2_4_57

Vendor Advisories for CVE-2020-36228(2)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(2)

Vendor / EcosystemFix (by version range) / PatchReleasedSource
ubuntuslapd-smbk5pwd (2.4.31-1+nmu2ubuntu8.5+esm7) @ trusty2026-11-11ubuntu
ubuntuslapd-smbk5pwd (2.4.42+dfsg-2ubuntu3.12) @ xenial2026-11-11ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Affected Packages

(18 across 18 ecosystems)
Alpine:v3.13(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.14(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.15(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.16(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.17(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.18(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.19(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.20(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.21(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.22(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.23(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Alpine:v3.24(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57-r0: fixed in 2.4.57-r0
—
Debian:10(1)
PackageVulnerable rangeFix by version rangeDependents
openldap2.4.47+dfsg-3 ... 2.4.47+dfsg-3+deb10u4 (7 versions)
  • every version up to 2.4.47+dfsg-3+deb10u5: fixed in 2.4.47+dfsg-3+deb10u5
—
Debian:11(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57+dfsg-1: fixed in 2.4.57+dfsg-1
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57+dfsg-1: fixed in 2.4.57+dfsg-1
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57+dfsg-1: fixed in 2.4.57+dfsg-1
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
openldap—
  • every version up to 2.4.57+dfsg-1: fixed in 2.4.57+dfsg-1
—
Debian:9(1)
PackageVulnerable rangeFix by version rangeDependents
openldap2.4.44+dfsg-5 ... 2.4.44+dfsg-5+deb9u6 (8 versions)
  • every version up to 2.4.44+dfsg-5+deb9u7: fixed in 2.4.44+dfsg-5+deb9u7
—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 65× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed its CVE.org record (CNA or CISA ADP). An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). "EchelonGraph re-scored" is our own recompute of this CVE's score, not an update from a source, and is not counted in the refreshes above. Most recent first.

Showing the most recent 100 of 197 rows on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 97 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-12 20:59 UTCEchelonGraph re-scored
  2. 2026-11-12 20:59 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  3. 2026-11-11 20:11 UTCEchelonGraph re-scored
  4. 2026-11-11 20:11 UTCVendor advisory
  5. 2026-11-11 20:11 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  6. 2026-11-11 16:31 UTCEPSS rescoreEPSS 85% · 99th percentile
  7. 2026-11-10 19:21 UTCEchelonGraph re-scored
  8. 2026-11-10 19:21 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-11-10 16:34 UTCEPSS rescoreEPSS 85% · 99th percentile
  10. 2026-11-09 18:26 UTCEchelonGraph re-scored
  11. 2026-11-09 18:26 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  12. 2026-11-08 17:38 UTCEchelonGraph re-scored
  13. 2026-11-08 17:38 UTCVendor advisory
  14. 2026-11-08 17:38 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  15. 2026-11-08 16:32 UTCEPSS rescoreEPSS 85% · 99th percentile
  16. 2026-11-07 16:50 UTCEchelonGraph re-scored
  17. 2026-11-07 16:50 UTCVendor advisory
  18. 2026-11-07 16:50 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  19. 2026-11-06 16:02 UTCEchelonGraph re-scored
  20. 2026-11-06 16:02 UTCVendor advisory
  21. 2026-11-06 16:02 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  22. 2026-11-05 15:14 UTCEchelonGraph re-scored
  23. 2026-11-05 15:14 UTCVendor advisory
  24. 2026-11-05 15:14 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-11-04 14:26 UTCEchelonGraph re-scored
Show 75 more
  1. 2026-11-04 14:26 UTCVendor advisory
  2. 2026-11-04 14:26 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  3. 2026-11-03 16:36 UTCEPSS rescoreEPSS 85% · 99th percentile
  4. 2026-11-03 13:38 UTCEchelonGraph re-scored
  5. 2026-11-03 13:38 UTCVendor advisory
  6. 2026-11-03 13:38 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  7. 2026-11-03 12:25 UTCOSV refresh
  8. 2026-11-02 12:32 UTCEchelonGraph re-scored
  9. 2026-11-02 12:32 UTCVendor advisory
  10. 2026-11-02 12:32 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  11. 2026-11-01 11:44 UTCEchelonGraph re-scored
  12. 2026-11-01 11:44 UTCVendor advisory
  13. 2026-11-01 11:44 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-10-31 10:55 UTCEchelonGraph re-scored
  15. 2026-10-31 10:55 UTCVendor advisory
  16. 2026-10-31 10:55 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-10-30 16:29 UTCEPSS rescoreEPSS 85% · 99th percentile
  18. 2026-10-30 10:07 UTCEchelonGraph re-scored
  19. 2026-10-30 10:07 UTCVendor advisory
  20. 2026-10-30 10:07 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-10-29 09:18 UTCEchelonGraph re-scored
  22. 2026-10-29 09:18 UTCVendor advisory
  23. 2026-10-29 09:18 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  24. 2026-10-28 08:30 UTCEchelonGraph re-scored
  25. 2026-10-28 08:30 UTCVendor advisory
  26. 2026-10-28 08:30 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  27. 2026-10-27 16:28 UTCEPSS rescoreEPSS 85% · 99th percentile
  28. 2026-10-27 07:22 UTCEchelonGraph re-scored
  29. 2026-10-27 07:22 UTCVendor advisory
  30. 2026-10-27 07:22 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  31. 2026-10-26 03:33 UTCVendor advisory
  32. 2026-10-26 03:33 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  33. 2026-10-25 18:43 UTCEchelonGraph re-scored
  34. 2026-10-25 16:28 UTCEPSS rescoreEPSS 85% · 99th percentile
  35. 2026-10-25 02:42 UTCEchelonGraph re-scored
  36. 2026-10-25 02:42 UTCVendor advisory
  37. 2026-10-25 02:42 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  38. 2026-10-24 01:54 UTCEchelonGraph re-scored
  39. 2026-10-24 01:54 UTCVendor advisory
  40. 2026-10-24 01:54 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  41. 2026-10-23 16:28 UTCEPSS rescoreEPSS 85% · 99th percentile
  42. 2026-10-23 01:06 UTCEchelonGraph re-scored
  43. 2026-10-23 01:06 UTCVendor advisory
  44. 2026-10-23 01:06 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  45. 2026-10-22 16:29 UTCEPSS rescoreEPSS 85% · 99th percentile
  46. 2026-10-22 00:16 UTCEchelonGraph re-scored
  47. 2026-10-22 00:16 UTCVendor advisory
  48. 2026-10-22 00:15 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  49. 2026-10-21 16:28 UTCEPSS rescoreEPSS 85% · 99th percentile
  50. 2026-10-20 23:27 UTCEchelonGraph re-scored
  51. 2026-10-20 23:27 UTCVendor advisory
  52. 2026-10-20 23:27 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  53. 2026-10-19 22:39 UTCEchelonGraph re-scored
  54. 2026-10-19 22:39 UTCVendor advisory
  55. 2026-10-19 22:39 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  56. 2026-10-19 16:27 UTCEPSS rescoreEPSS 85% · 99th percentile
  57. 2026-10-18 21:23 UTCEchelonGraph re-scored
  58. 2026-10-18 21:23 UTCVendor advisory
  59. 2026-10-18 21:23 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  60. 2026-10-18 09:22 UTCEchelonGraph re-scored
  61. 2026-10-17 19:56 UTCEchelonGraph re-scored
  62. 2026-10-17 19:56 UTCVendor advisory
  63. 2026-10-17 19:55 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  64. 2026-10-16 19:07 UTCEchelonGraph re-scored
  65. 2026-10-16 19:07 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  66. 2026-10-15 16:27 UTCEPSS rescoreEPSS 85% · 99th percentile
  67. 2026-10-15 16:19 UTCEchelonGraph re-scored
  68. 2026-10-15 16:19 UTCVendor advisory
  69. 2026-10-15 16:19 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  70. 2026-10-14 16:28 UTCEPSS rescoreEPSS 85% · 99th percentile
  71. 2026-10-14 10:26 UTCVendor advisory
  72. 2026-10-14 10:26 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5
  73. 2026-10-14 09:50 UTCEchelonGraph re-scored
  74. 2026-10-14 09:50 UTCVendor advisory
  75. 2026-10-14 09:50 UTCGHSA enrichmentGHSA-46gp-cxcx-7c88 · GitHub severity HIGH · GitHub CVSS 7.5

Frequently asked(5)

What is CVE-2020-36228?
CVE-2020-36228 is a critical-severity vulnerability; its CVE record was published on January 26, 2021. An integer underflow was discovered in OpenLDAP before 2.4.57 leading to a slapd crash in the Certificate List Exact Assertion processing, resulting in denial of service.
When was the CVE record for CVE-2020-36228 published?
The CVE record for CVE-2020-36228 was published on January 26, 2021. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 14, 2026; the record at its source may have been updated since.
Is CVE-2020-36228 actively exploited?
CVE-2020-36228 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 85% probability of exploitation in the next 30 days (99th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2020-36228?
CVE-2020-36228 has a CVSS v3 base score of 7.5 (NVD). EchelonGraph synthesises NVD + FIRST EPSS + GHSA into a combined EG score of 9.0 (CRITICAL).
How do I remediate CVE-2020-36228?
A fix for CVE-2020-36228 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2020-36228 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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