Is CVE-2026-33824 actively exploited?

Yes. KEV Intelligence tracks CVE-2026-33824 as a known exploited vulnerability. Confidence is confirmed.

What exploitation activity has KEV Intelligence observed?

KEV Intelligence has not yet recorded sensor-observed exploitation attempts for CVE-2026-33824. Our sensors continue to monitor for activity targeting this CVE.

Which versions are affected?

CVE-2026-33824 affects Microsoft Windows 10 Version 1607 and 17 other products. KEV Intelligence lists 17 version rows; examples include 10.0.14393.0 to < 10.0.14393.9060, 10.0.17763.0 to < 10.0.17763.8644, and 10.0.19044.0 to < 10.0.19044.7184.

Yes. CVE-2026-33824 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

CVE-2026-33824 Exploited in the Wild — Windows 10 Version 1607, Windows 10 Version 1809, Windows 10 Version 21H2, Windows 10 Version 22H2, Windows 11 version 22H3, Windows 11 Version 23H2, Windows 11 Version 24H2, Windows 11 Version 25H2, Windows 11 version 26H1, Windows Server 2016, Windows Server 2016 (Server Core installation), Windows Server 2019, Windows Server 2019 (Server Core installation), Windows Server 2022, Windows Server 2022, 23H2 Edition (Server Core installation), Windows Server 2025, Windows Server 2025 (Server Core installation)

Q: What is CVE-2026-33824?

CVE-2026-33824 is an unauthenticated vulnerability affecting Microsoft Windows 10 Version 1607 and 17 other products. Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.

Q: How should organizations remediate it?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Q: Is it in CISA KEV?

Yes. CVE-2026-33824 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

Decision summary

What security teams need to know first

Direct answers before the deeper technical record.

What it is

CVE-2026-33824 is an unauthenticated vulnerability affecting Microsoft Windows 10 Version 1607 and 17 other products. Double free in Windows IKE Extension allows an unauthorized attacker to execute code over a network.

Is it exploited?

Yes. KEV Intelligence tracks this CVE as a known exploited vulnerability. Confidence is confirmed.

Who is affected?

Microsoft / Windows 10 Version 1607 affected before 10.0.14393.9060.

What should we do?

Prioritize remediation. Validate affected assets and apply vendor fixes on an accelerated timeline.

Overview

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

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

Vendor Product Affected Status

Microsoft Windows 10 Version 1607 Before 10.0.14393.9060 Affected

Microsoft Windows 10 Version 1809 Before 10.0.17763.8644 Affected

Microsoft Windows 10 Version 21H2 Before 10.0.19044.7184 Affected

Microsoft Windows 10 Version 22H2 Before 10.0.19045.7184 Affected

Microsoft Windows 11 version 22H3 Before 10.0.22631.6936 Affected

Microsoft Windows 11 Version 23H2 Before 10.0.22631.6936 Affected

Microsoft Windows 11 Version 24H2 Before 10.0.26100.8246 Affected

Microsoft Windows 11 Version 25H2 Before 10.0.26200.8246 Affected

Microsoft Windows 11 version 26H1 Before 10.0.28000.1836 Affected

Microsoft Windows Server 2016 Before 10.0.14393.9060 Affected

Microsoft Windows Server 2016 (Server Core installation) Before 10.0.14393.9060 Affected

Microsoft Windows Server 2019 Before 10.0.17763.8644 Affected

Microsoft Windows Server 2019 (Server Core installation) Before 10.0.17763.8644 Affected

Microsoft Windows Server 2022 Before 10.0.20348.5020 Affected

Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) Before 10.0.25398.2274 Affected

Microsoft Windows Server 2025 Before 10.0.26100.32690 Affected

Microsoft Windows Server 2025 (Server Core installation) Before 10.0.26100.32690 Affected

View vendor advisory

Published: 14 Apr 2026
Exploitation Reported: 18 Aug 2026
Attack vector: Remote
Complexity: Low
Privileges: None
User interaction: None

CVE References

CVE Record CVE.org · CVE Record https://www.cve.org/CVERecord?id=CVE-2026-33824
Windows Internet Key Exchange (IKE) Service Extensions Remote Code Execution Vulnerability msrc.microsoft.com · Vendor Advisory https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-33824

Exploitation evidence

Why KEV Intelligence marks this CVE as exploited

Third-party attestation and first-party sensor observation are shown separately so teams can judge the evidence chain.

Exploited in the wild

CISA

Recorded 18 Aug 2026

Independent exploitation attestation added to the KEV Intelligence record.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the KEV Intelligence Pro API.

Learn about Pro API access

Source	Added
CISA First	2026-08-18 16:52 UTC
CVE	2026-08-18 17:51 UTC

Detection

Operational artifacts and observed signals

Make the evidence actionable in scanner, SOC, and edge-control workflows.

Observed signals

Request targets: 0
User-Agents: 0

Raw values available in Pro and Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No KEV Intelligence virtual patch is currently available. Future rules ship for ModSecurity, Cloudflare, and AWS WAF.

Learn about virtual patches →

No detection artifacts or sensor request patterns are available for this CVE yet.

Check back as sensor telemetry and scanner integrations are updated.

Risk and context

Severity, weaknesses, and research context

CVSS v3.1

9.8 Critical

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:U/RL:O/RC:C

EPSS

55.9%

Weaknesses

Double Free CWE-415

Recent mention · Tenable Blog

The Agentic AI threat cluster: Seven incidents, three actors, and what they mean for your exposure

Tenable’s Research Special Operations (RSO) team has been tracking a cluster of agentic AI threat activity since late July 2026. The Taiwan autonomous AI cyber attack confirmed what the cluster data already showed: near-autonomous offensive AI has crossed from theoretical risk...

Read full advisory

Timeline

From disclosure to observed exploitation

18 Aug 2026
KEV confirmed by CVE

Exploitation attested by an external source
18 Aug 2026
Added to CISA KEV

Listed in the CISA Known Exploited Vulnerabilities catalog
14 Apr 2026
CVE published

Vulnerability disclosed publicly
24 Mar 2026
CVE ID reserved

Identifier reserved by the CNA

Pro API

Automate this intelligence

Confidence, exploit status, sensor telemetry, PoCs, scanner integrations, mentions, and tags are available programmatically for VM, SOC, and CTI workflows.

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Evidence confidence and provenance
First-party sensor telemetry
PoC and scanner references
Affected versions and enrichment
Automation-ready JSON delivery

GET /api/v2/pro/kevs/CVE-2026-33824

Free JSON includes basic KEV fields

{
  "cve_id": "CVE-2026-33824",
  "confidence": "Confirmed",
  "cvss_score": 9.8,
  "cvss_estimated": false,
  "epss_score": 0.5585,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}

CVE-2026-33824