CVE-2026-65818

CRITICALNVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.9 under NVD CVSS v3. EPSS exploit probability: 0.3%, top 73% of all CVEs by exploit prediction. GitHub Security Advisory enrichment pending alignment with NVD CVSS.

Triggered by: NVD CVSS baseline
Sources: epss, ghsa, nvd
Trending — 4 sources updated this week
9.9EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: None knownExposed: 0

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

Server-side request forgery (ssrf) in Power Automate allows an authorized attacker to elevate privileges over a network.

CVSS v3
9.9
EG Score
9.9(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity99% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
27%
KEV
Not listed

Published

September 3, 2026

Last Modified

September 18, 2026

Advisory Details (1)

Auto-updated Sep 18, 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-2026-65818

Vendor Advisories for CVE-2026-65818(2)

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 99× in last 7d / 210× 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 210 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-65818?
CVE-2026-65818 is a critical vulnerability published on September 3, 2026. Server-side request forgery (ssrf) in Power Automate allows an authorized attacker to elevate privileges over a network.
When was CVE-2026-65818 disclosed?
CVE-2026-65818 was first published in the National Vulnerability Database on September 3, 2026, with the most recent update on September 18, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-65818 actively exploited?
CVE-2026-65818 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 72.6% of all scored CVEs.
What is the CVSS score of CVE-2026-65818?
CVE-2026-65818 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-65818?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-65818, 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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