CVE-2026-40417

HIGHPre-NVD 7.87.8
EchelonGraph scoreMEDIUM confidence

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

Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-05-12. A secondary CVSS source baseline 7.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
7.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.3%CVSS: 7.8Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Weak authentication in Dynamics Business Central allows an authorized attacker to elevate privileges locally.

CVSS v3
7.8
EG Score
7.8HIGHmedium confidence
EG Risk
35
EG Risk 35/100

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed (value × EchelonGraph’s weight)
Severity78% × 45%
The EG Score, 7.8 of 10.
Exploitation0.3% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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.
EPSS PROB
0.3%
EPSS %ILE
20th
KEV
Not listed

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 (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

May 12, 2026

Last Modified

August 10, 2026

Advisory Details (1)

Auto-updated May 20, 2026
Patch available. Sources: microsoft.
MicrosoftMentions a patch (unverified)

Security Update Guide - Microsoft Security Response Center

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-40417

Vendor Advisories for CVE-2026-40417(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 11× in last 7d / 26× 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 it from the CNA feed. 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). Most recent first.

Showing the most recent 99 of 299 refreshes 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 200 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  2. 2026-10-12 16:09 UTCEG score recompute
  3. 2026-10-11 19:51 UTCEG score recompute
  4. 2026-10-11 17:05 UTCEG score recompute
  5. 2026-10-11 14:31 UTCEG score recompute
  6. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  7. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  8. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  9. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  12. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  15. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  17. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  18. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  20. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  21. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  23. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  25. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 19th percentile
Show 74 more
  1. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  2. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  3. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  4. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  5. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  6. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  7. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  8. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  9. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  10. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  11. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  12. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  13. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  14. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  15. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  16. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  17. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  18. 2026-08-23 18:13 UTCEG score recompute
  19. 2026-08-23 18:13 UTCVendor advisory
  20. 2026-08-23 18:13 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  21. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  23. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  25. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  26. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  27. 2026-08-17 10:50 UTCEG score recompute
  28. 2026-08-17 10:50 UTCVendor advisory
  29. 2026-08-17 10:50 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  30. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  31. 2026-08-16 04:13 UTCEG score recompute
  32. 2026-08-16 04:13 UTCVendor advisory
  33. 2026-08-16 04:13 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  34. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  35. 2026-08-15 02:15 UTCEG score recompute
  36. 2026-08-15 02:15 UTCVendor advisory
  37. 2026-08-15 02:15 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  38. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  39. 2026-08-14 14:29 UTCVendor advisory
  40. 2026-08-14 14:29 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  41. 2026-08-14 02:43 UTCEG score recompute
  42. 2026-08-14 02:43 UTCVendor advisory
  43. 2026-08-14 02:43 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  44. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  45. 2026-08-13 03:46 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  46. 2026-08-12 16:01 UTCEG score recompute
  47. 2026-08-12 16:01 UTCVendor advisory
  48. 2026-08-12 16:01 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  49. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  50. 2026-08-11 16:01 UTCEG score recompute
  51. 2026-08-11 16:01 UTCVendor advisory
  52. 2026-08-11 16:01 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  53. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  54. 2026-08-11 04:15 UTCEG score recompute
  55. 2026-08-11 04:15 UTCVendor advisory
  56. 2026-08-11 04:15 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  57. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  58. 2026-08-10 16:29 UTCEG score recompute
  59. 2026-08-10 16:29 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  60. 2026-08-10 15:27 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  61. 2026-08-10 13:36 UTCVendor advisory
  62. 2026-08-10 13:36 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  63. 2026-08-10 01:36 UTCVendor advisory
  64. 2026-08-10 01:36 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  65. 2026-08-09 13:50 UTCEG score recompute
  66. 2026-08-09 13:50 UTCVendor advisory
  67. 2026-08-09 13:50 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  68. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  69. 2026-08-09 02:04 UTCEG score recompute
  70. 2026-08-09 02:04 UTCVendor advisory
  71. 2026-08-09 02:04 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  72. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  73. 2026-08-08 08:39 UTCGHSA enrichmentGHSA-x37p-2fc6-57xh · GitHub severity HIGH · GitHub CVSS 7.8
  74. 2026-08-07 20:53 UTCEG score recompute

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-40417?
CVE-2026-40417 is a high-severity vulnerability; its CVE record was published on May 12, 2026. Weak authentication in Dynamics Business Central allows an authorized attacker to elevate privileges locally.
When was CVE-2026-40417 made public?
CVE-2026-40417 was made public on May 12, 2026: that is the date its CVE record's CNA, Microsoft Corporation, gives for when the vulnerability was made public. The CVE record itself was published on May 12, 2026. EchelonGraph's copy of the record carries a last-modified date of August 10, 2026; the record at its source may have been updated since.
Is CVE-2026-40417 actively exploited?
CVE-2026-40417 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (20th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40417?
CVE-2026-40417 has a CVSS base score of 7.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-40417?
A fix for CVE-2026-40417 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-40417 are linked in the Vendor Advisories panel on this page.

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