CVE-2026-33824

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score elevated to 9.8 because this CVE is listed on the CISA Known Exploited Vulnerabilities catalog (added 2026-08-18), indicating real-world exploitation has been confirmed by US federal agencies. a secondary CVSS source baseline 9.8 retained for reference (NVD's own analysis pending). Confidence: HIGH.

Triggered by: CISA KEV (actively exploited)
Sources: cisa_kev, epss, ghsa, secondary
Trending — 5 sources updated this weekExploited in the wild
9.8EG
EchelonGraph verdictPatch nowTreat as an emergency — this is being exploited.
  • Actively exploited in the wild (CISA-KEV)
CISA-KEV: ExploitedEPSS PROB: 73%CVSS: 9.8Exploit: cisa kev · ssvc active · epss top5pct · epss high · public exploitExposed: 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(high)
EG Risk
99(Act)
EG Risk 99/100SSVC: Act

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%
Exploitation100% × 40%
Automatability100% × 15%
Action: Fix now — active exploitation, automatable, high impact.
EPSS PROB
73%
EPSS %ILE
99%
KEV
⚠ Exploited

Published

April 14, 2026

Last Modified

August 19, 2026

Advisory Details (3)

Auto-updated Sep 16, 2026
⚠️ Active exploitation confirmed. Patch available. Sources: microsoft, cisa.
cisa Patch Available🔴 Active Exploitation

Known Exploited Vulnerabilities Catalog | CISA

Known Exploited Vulnerabilities Catalog | CISA. Listed in CISA Known Exploited Vulnerabilities catalog.

https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-33824
generic

Chinese-Speaking Threat Actor Harnesses AI Models for Autonomous Cyberattacks

https://unit42.paloaltonetworks.com/autonomous-ai-cyber-attack-campaign/
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(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 97× in last 7d / 391× 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 695 total refreshes for this CVE.

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

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 ↗

Frequently asked(6)

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 August 19, 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?
Yes. CISA added CVE-2026-33824 to the Known Exploited Vulnerabilities catalog on August 18, 2026, affecting Microsoft Internet Key Exchange (IKE) Service Extensions. KEV listing indicates confirmed exploitation in the wild; this CVE warrants immediate patching attention.
What is the CVSS score of CVE-2026-33824?
CVE-2026-33824 has a CVSS v3 base score of 9.8 (NVD).
Which products are affected by CVE-2026-33824?
CVE-2026-33824 affects Microsoft Internet Key Exchange (IKE) Service Extensions. The full affected-products list, including version ranges and fixed versions, is shown in the Affected Packages section of this page.
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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