CVE-2024-30166

CRITICALPre-NVD 9.19.1
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2024-04-03. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: CISA-ADP (Vulnrichment) CVSS v3.1, EPSS, GitHub Security Advisory

Also known asEUVD-2024-28102 (ENISA EUVD) · GHSA-jqcx-vw98-5q84 (GitHub Security Advisories)Source: ENISA EUVD

9.1EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.7%CVSS: 9.1Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

In Mbed TLS 3.3.0 through 3.5.2 before 3.6.0, a malicious client can cause information disclosure or a denial of service because of a stack buffer over-read (of less than 256 bytes) in a TLS 1.3 server via a TLS 3.1 ClientHello.

CVSS v3
9.1
EG Score
9.1CRITICALmedium confidence
EG Risk
56
EG Risk 56/100

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)
Severity91% × 45%
Impact severity (EG Severity): CVSS 9.1 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.7% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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 at low or medium mission impact and sooner than that at high.
EPSS PROB
0.7%
EPSS %ILE
54th
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 (9.1): severity, escalated by confirmed exploitation. This CVE's 9.1 is its impact severity (EG Severity), not escalated.

EG Severity
9.1 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
0.7% 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (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; 60 days if it is not.

The score's inputs: In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). 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

April 3, 2024

Last Modified

June 5, 2026

Advisory Details (2)

Auto-updated Aug 1, 2026
Patch available. Sources: github_release.
Web page

Security Advisories — Mbed TLS documentation

https://mbed-tls.readthedocs.io/en/latest/tech-updates/security-advisories/
GitHub release Patch Available

Mbed TLS 3.6.0 LTS

Patch available: Mbed-TLS/mbedtls v3.6.0

https://github.com/Mbed-TLS/mbedtls/releases/tag/v3.6.0

Vendor Advisories for CVE-2024-30166(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 18× in last 7d / 75× 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 312 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 212 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-11-13 16:47 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  2. 2026-11-13 11:17 UTCEchelonGraph re-scored
  3. 2026-11-13 11:17 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  4. 2026-11-12 16:31 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  5. 2026-11-12 09:14 UTCEchelonGraph re-scored
  6. 2026-11-12 09:14 UTCVendor advisory
  7. 2026-11-12 09:14 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  8. 2026-11-11 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  9. 2026-11-11 07:11 UTCEchelonGraph re-scored
  10. 2026-11-11 07:11 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  11. 2026-11-10 16:38 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  12. 2026-11-10 05:04 UTCEchelonGraph re-scored
  13. 2026-11-10 05:04 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-11-09 16:31 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  15. 2026-11-09 03:01 UTCEchelonGraph re-scored
  16. 2026-11-09 03:01 UTCVendor advisory
  17. 2026-11-09 03:01 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  18. 2026-11-08 16:36 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  19. 2026-11-08 00:58 UTCEchelonGraph re-scored
  20. 2026-11-08 00:58 UTCVendor advisory
  21. 2026-11-08 00:58 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  22. 2026-11-07 16:35 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  23. 2026-11-06 22:54 UTCEchelonGraph re-scored
  24. 2026-11-06 22:54 UTCVendor advisory
  25. 2026-11-06 22:54 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
Show 75 more
  1. 2026-11-06 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  2. 2026-11-05 20:51 UTCEchelonGraph re-scored
  3. 2026-11-05 20:51 UTCVendor advisory
  4. 2026-11-05 20:51 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  5. 2026-11-05 16:34 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  6. 2026-11-04 23:25 UTCOSV refresh
  7. 2026-11-04 18:48 UTCEchelonGraph re-scored
  8. 2026-11-04 18:48 UTCVendor advisory
  9. 2026-11-04 18:48 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  10. 2026-11-04 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  11. 2026-11-03 16:45 UTCEchelonGraph re-scored
  12. 2026-11-03 16:45 UTCVendor advisory
  13. 2026-11-03 16:45 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  14. 2026-11-03 16:42 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  15. 2026-11-02 16:40 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  16. 2026-11-02 14:31 UTCEchelonGraph re-scored
  17. 2026-11-02 14:31 UTCVendor advisory
  18. 2026-11-02 14:31 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  19. 2026-11-01 16:31 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  20. 2026-11-01 12:29 UTCEchelonGraph re-scored
  21. 2026-11-01 12:29 UTCVendor advisory
  22. 2026-11-01 12:29 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  23. 2026-10-31 16:30 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  24. 2026-10-31 10:26 UTCEchelonGraph re-scored
  25. 2026-10-31 10:26 UTCVendor advisory
  26. 2026-10-31 10:26 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  27. 2026-10-30 16:32 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  28. 2026-10-30 08:22 UTCEchelonGraph re-scored
  29. 2026-10-30 08:22 UTCVendor advisory
  30. 2026-10-30 08:22 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  31. 2026-10-29 16:30 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  32. 2026-10-29 06:18 UTCEchelonGraph re-scored
  33. 2026-10-29 06:18 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  34. 2026-10-28 16:29 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  35. 2026-10-28 04:15 UTCEchelonGraph re-scored
  36. 2026-10-28 04:15 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  37. 2026-10-27 16:29 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  38. 2026-10-27 02:01 UTCEchelonGraph re-scored
  39. 2026-10-27 02:01 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  40. 2026-10-26 16:29 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  41. 2026-10-25 19:57 UTCVendor advisory
  42. 2026-10-25 19:57 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  43. 2026-10-25 17:13 UTCEchelonGraph re-scored
  44. 2026-10-25 16:30 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  45. 2026-10-24 17:54 UTCEchelonGraph re-scored
  46. 2026-10-24 17:54 UTCVendor advisory
  47. 2026-10-24 17:54 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  48. 2026-10-24 16:30 UTCEPSS rescoreEPSS 0.7% · 54th percentile
  49. 2026-10-23 16:29 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  50. 2026-10-23 15:51 UTCEchelonGraph re-scored
  51. 2026-10-23 15:51 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  52. 2026-10-22 16:31 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  53. 2026-10-22 13:47 UTCEchelonGraph re-scored
  54. 2026-10-22 13:46 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  55. 2026-10-21 16:29 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  56. 2026-10-21 11:43 UTCEchelonGraph re-scored
  57. 2026-10-21 11:43 UTCVendor advisory
  58. 2026-10-21 11:43 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  59. 2026-10-20 16:30 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  60. 2026-10-20 09:40 UTCEchelonGraph re-scored
  61. 2026-10-20 09:40 UTCVendor advisory
  62. 2026-10-20 09:39 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  63. 2026-10-19 16:29 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  64. 2026-10-19 07:35 UTCEchelonGraph re-scored
  65. 2026-10-19 07:35 UTCVendor advisory
  66. 2026-10-19 07:35 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  67. 2026-10-18 05:31 UTCEchelonGraph re-scored
  68. 2026-10-18 05:31 UTCVendor advisory
  69. 2026-10-18 05:31 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  70. 2026-10-17 16:30 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  71. 2026-10-17 03:27 UTCEchelonGraph re-scored
  72. 2026-10-17 03:27 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1
  73. 2026-10-16 16:36 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  74. 2026-10-16 01:24 UTCEchelonGraph re-scored
  75. 2026-10-16 01:24 UTCGHSA enrichmentGHSA-jqcx-vw98-5q84 · GitHub severity CRITICAL · GitHub CVSS 9.1

Frequently asked(5)

What is CVE-2024-30166?
CVE-2024-30166 is a critical-severity vulnerability; its CVE record was published on April 3, 2024. In Mbed TLS 3.3.0 through 3.5.2 before 3.6.0, a malicious client can cause information disclosure or a denial of service because of a stack buffer over-read (of less than 256 bytes) in a TLS 1.3 server via a TLS 3.1 ClientHello.
When was the CVE record for CVE-2024-30166 published?
The CVE record for CVE-2024-30166 was published on April 3, 2024. 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 June 5, 2026; the record at its source may have been updated since.
Is CVE-2024-30166 actively exploited?
CVE-2024-30166 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.7% probability of exploitation in the next 30 days (54th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2024-30166?
CVE-2024-30166 has a CVSS v3.1 base score of 9.1 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2024-30166?
A fix for CVE-2024-30166 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2024-30166 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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