CVE-2026-33824

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-14. the CNA's CVSS baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:microsoft, epss, ghsa
Elevated
9.8
EchelonGraph verdictPatch this weekExploitation is likely or a public exploit exists.
  • High exploitation likelihood — EPSS 56%
CISA-KEV: Not listedEPSS: 56%CVSS: 9.8Exploit: NoneExposed: 0

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

Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
81(Track)
EG Risk 81/100SSVC: 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
Severity98% × 45%
Exploitation56% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
98.9%
KEV
Not listed

Published

April 14, 2026

Last Modified

July 24, 2026

Advisory Details (1)

Auto-updated Jul 12, 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-2026-33824

Vendor Advisories for CVE-2026-33824(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 8× in last 7d / 26× 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 151 total refreshes for this CVE.

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

Publicly available exploits

(1 reference)

Working exploit code is in the public domain (1 GitHub PoC). Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • GitHub PoCEpSiLoNPoInTOrI/IKEV2-POC
    First seen May 18, 2026

    IKEv2, ikeext.dll, CVE-2026-33824, double free, heap grooming, ROP, SKF fragmentation, Windows exploit, anti-debug, obfuscation, API hooking, shellcode, reverse shell

    Open source ↗

Related CVEs(same vendor + same CWE)

Frequently asked(5)

What is CVE-2026-33824?
CVE-2026-33824 is a critical vulnerability published on April 14, 2026. Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.
When was CVE-2026-33824 disclosed?
CVE-2026-33824 was first published in the National Vulnerability Database on April 14, 2026, with the most recent update on July 24, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33824 actively exploited?
CVE-2026-33824 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 98.9% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-33824?
CVE-2026-33824 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-33824?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33824, 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

Explore the affected products and dependency analysis for CVE-2026-33824

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