CVE-2026-42898

CRITICALPre-NVD 9.99.9
EchelonGraph scoreMEDIUM confidence

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

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-12. The CNA's CVSS baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 4 sources updated this week
9.9EG
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: 1.0%CVSS: 9.9Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

Improper control of generation of code ('code injection') in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code over a network.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
45
EG Risk 45/100

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)
Severity99% × 45%
The EG Score, 9.9 of 10.
Exploitation1.0% × 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
1.0%
EPSS %ILE
61st
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 Oct 13, 2026
Patch available. Sources: microsoft.
Microsoft

Security Update Guide - Microsoft Security Response Center

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42898

Vendor Advisories for CVE-2026-42898(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 22× in last 7d / 37× 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 100 of 512 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. None are among the latest 100 rows. The 412 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  2. 2026-10-16 12:30 UTCEG score recompute
  3. 2026-10-16 12:30 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  4. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  5. 2026-10-15 14:18 UTCEG score recompute
  6. 2026-10-15 14:18 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  8. 2026-10-14 09:02 UTCEG score recompute
  9. 2026-10-14 09:02 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  10. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  11. 2026-10-13 05:45 UTCEG score recompute
  12. 2026-10-13 05:45 UTCVendor advisory
  13. 2026-10-13 05:45 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  14. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  15. 2026-10-12 16:06 UTCEG score recompute
  16. 2026-10-12 07:56 UTCVendor advisory
  17. 2026-10-12 07:55 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  18. 2026-10-11 19:48 UTCEG score recompute
  19. 2026-10-11 17:03 UTCEG score recompute
  20. 2026-10-11 14:29 UTCEG score recompute
  21. 2026-10-11 13:48 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  22. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  23. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  24. 2026-10-08 17:12 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  25. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.0% · 61st percentile
Show 75 more
  1. 2026-10-06 15:17 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  2. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  3. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  4. 2026-10-03 14:25 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  5. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  6. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.0% · 61st percentile
  7. 2026-09-27 13:48 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  8. 2026-09-26 15:58 UTCEPSS rescoreEPSS 1.0% · 60th percentile
  9. 2026-09-23 17:53 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  10. 2026-09-20 20:15 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  11. 2026-09-18 19:28 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  12. 2026-09-17 19:31 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  13. 2026-09-16 14:08 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  14. 2026-09-16 05:15 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  15. 2026-09-13 16:47 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  16. 2026-09-12 15:01 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  17. 2026-09-11 14:53 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  18. 2026-09-11 09:37 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  19. 2026-09-10 09:34 UTCEPSS rescoreEPSS 1.2% · 66th percentile
  20. 2026-09-08 22:00 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  21. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  22. 2026-09-06 13:47 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  23. 2026-09-04 05:06 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  24. 2026-09-02 14:12 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  25. 2026-09-01 13:54 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  26. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  27. 2026-08-30 01:22 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  28. 2026-08-28 21:41 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  29. 2026-08-27 14:25 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  30. 2026-08-26 14:46 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  31. 2026-08-25 13:49 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  32. 2026-08-23 22:00 UTCVendor advisory
  33. 2026-08-23 22:00 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  34. 2026-08-23 18:11 UTCEG score recompute
  35. 2026-08-23 18:11 UTCVendor advisory
  36. 2026-08-23 18:11 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  37. 2026-08-23 00:19 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  38. 2026-08-21 23:49 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  39. 2026-08-20 22:55 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  40. 2026-08-19 17:03 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  41. 2026-08-18 13:48 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  42. 2026-08-17 14:42 UTCEG score recompute
  43. 2026-08-17 14:42 UTCVendor advisory
  44. 2026-08-17 14:42 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  45. 2026-08-17 13:47 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  46. 2026-08-17 10:49 UTCEG score recompute
  47. 2026-08-17 10:49 UTCVendor advisory
  48. 2026-08-17 10:49 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  49. 2026-08-16 14:56 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  50. 2026-08-16 11:43 UTCVendor advisory
  51. 2026-08-16 11:43 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  52. 2026-08-16 07:57 UTCVendor advisory
  53. 2026-08-16 07:57 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  54. 2026-08-16 04:12 UTCEG score recompute
  55. 2026-08-16 04:12 UTCVendor advisory
  56. 2026-08-16 04:12 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  57. 2026-08-16 02:14 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  58. 2026-08-15 01:31 UTCEG score recompute
  59. 2026-08-15 01:31 UTCVendor advisory
  60. 2026-08-15 01:31 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  61. 2026-08-15 01:30 UTCEPSS rescoreEPSS 1.2% · 65th percentile
  62. 2026-08-14 21:46 UTCVendor advisory
  63. 2026-08-14 21:46 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  64. 2026-08-14 18:01 UTCVendor advisory
  65. 2026-08-14 18:01 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  66. 2026-08-14 13:57 UTCVendor advisory
  67. 2026-08-14 13:57 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  68. 2026-08-14 10:12 UTCVendor advisory
  69. 2026-08-14 10:12 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  70. 2026-08-14 06:27 UTCVendor advisory
  71. 2026-08-14 06:27 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  72. 2026-08-14 02:42 UTCEG score recompute
  73. 2026-08-14 02:42 UTCVendor advisory
  74. 2026-08-14 02:42 UTCGHSA enrichmentGHSA-f8w6-8hpv-rrjj · GitHub severity CRITICAL · GitHub CVSS 9.9
  75. 2026-08-13 22:00 UTCEPSS rescoreEPSS 1.2% · 65th percentile

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Frequently asked(5)

What is CVE-2026-42898?
CVE-2026-42898 is a critical-severity vulnerability; its CVE record was published on May 12, 2026. Improper control of generation of code ('code injection') in Microsoft Dynamics 365 (on-premises) allows an authorized attacker to execute code over a network.
When was CVE-2026-42898 made public?
CVE-2026-42898 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-2026-42898 actively exploited?
CVE-2026-42898 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.0% probability of exploitation in the next 30 days (61st percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-42898?
CVE-2026-42898 has a CVSS base score of 9.9 (the CNA's own assessment, by microsoft; NVD's own analysis pending).
How do I remediate CVE-2026-42898?
A fix for CVE-2026-42898 is available: update to the fixed version the vendor names in its advisory. The vendor advisories EchelonGraph has for CVE-2026-42898 are linked in the Vendor Advisories panel on this page.

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