CVE-2026-42833

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-12. the CNA's CVSS baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Trending — 4 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.1Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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
9.1
EG Score
9.1(medium)
EG Risk
41(Track)
EG Risk 41/100SSVC: Track

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
Severity91% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
52%
KEV
Not listed

Published

May 12, 2026

Last Modified

August 10, 2026

Advisory Details (1)

Auto-updated Aug 1, 2026
Patch available. Sources: microsoft.
microsoft Patch Available

Security Update Guide - Microsoft Security Response Center

Security Update Guide - Microsoft Security Response Center. Patch available via Microsoft Security Update

https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-42833

Vendor Advisories for CVE-2026-42833(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 10× in last 7d / 159× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. 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. Most recent first.

Showing the most recent 100 of 437 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-42833?
CVE-2026-42833 is a critical vulnerability 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-2026-42833 disclosed?
CVE-2026-42833 was first published in the National Vulnerability Database on May 12, 2026, with the most recent update on August 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-42833 actively exploited?
CVE-2026-42833 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 47.9% of all scored CVEs.
What is the CVSS score of CVE-2026-42833?
CVE-2026-42833 has a CVSS v4.0 base score of 9.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-42833?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-42833, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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