Vulnerability report

Exploited in the wild Confirmed confidence In CISA KEV

CVE-2026-33824

Windows 10 Version 1607 Remote Code Execution

Microsoft / Windows 10 Version 1607 · affected before 10.0.14393.9060

Watch CVE-2026-33824 Browse KEV feed
Severity
CVSS 9.8 · Critical
Confidence
Confirmed
Exploit status
Exploited in the wild
EPSS
1.6%
First observed
—
Last observed
—

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. Previdian tracks this CVE as a known exploited vulnerability. Confidence is confirmed. Listed in CISA KEV. Also confirmed by third-party sources.

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.

Microsoft Affected
Windows 10 Version 1607
Before 10.0.14393.9060
Microsoft Affected
Windows 10 Version 1809
Before 10.0.17763.8644
Microsoft Affected
Windows 10 Version 21H2
Before 10.0.19044.7184
Microsoft Affected
Windows 10 Version 22H2
Before 10.0.19045.7184
Microsoft Affected
Windows 11 version 23H2
Before 10.0.22631.6936
Microsoft Affected
Windows 11 Version 23H2
Before 10.0.22631.6936
Microsoft Affected
Windows 11 Version 24H2
Before 10.0.26100.8246
Microsoft Affected
Windows 11 Version 25H2
Before 10.0.26200.8246
Microsoft Affected
Windows 11 version 26H1
Before 10.0.28000.1836
Microsoft Affected
Windows Server 2016
Before 10.0.14393.9060
Microsoft Affected
Windows Server 2016 (Server Core installation)
Before 10.0.14393.9060
Microsoft Affected
Windows Server 2019
Before 10.0.17763.8644
Microsoft Affected
Windows Server 2019 (Server Core installation)
Before 10.0.17763.8644
Microsoft Affected
Windows Server 2022
Before 10.0.20348.5020
Microsoft Affected
Windows Server 2022, 23H2 Edition (Server Core installation)
Before 10.0.25398.2274
Microsoft Affected
Windows Server 2025
Before 10.0.26100.32690
Microsoft Affected
Windows Server 2025 (Server Core installation)
Before 10.0.26100.32690
View vendor advisory (opens in new tab)
Published
14 Apr 2026
Exploitation Reported
18 Aug 2026
Attack vector
Remote
Complexity
Low
Privileges
None
User interaction
None

Tags

windows microsoft cisa

CVE References

Exploitation evidence

Why Previdian 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

A trusted third party reported exploitation.

Known exploited vulnerability sources

Per-source evidence links for KEV attestations are available through the Previdian 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
User-Agents
Callback hosts
0
0
0

Request targets and User-Agents available in Pro. Callback host details available in Enterprise.

Scanner coverage

No scanner integrations recorded yet.

Virtual patch status

No Previdian 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

Potential damage if exploited. Separate from whether attackers are using it.

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

1.6%

Estimated chance of exploitation in the next 30 days. Previdian's warning comes from evidence, not this score.

Weaknesses

Double Free CWE-415

Recent mention · RecordedFuture

August 2026 CVE Landscape

In August 2026, Insikt Group® identified 73 high-impact vulnerabilities that should be prioritized for remediation, 43 of which had a Very Critical Recorded Future Risk Score. This represents a 14% decrease from last month.

Read full advisory

All Mentions

Recent mention · RecordedFuture

August 2026 CVE Landscape

RecordedFuture · 08 Sep 2026

In August 2026, Insikt Group® identified 73 high-impact vulnerabilities that should be prioritized for remediation, 43 of which had a Very Critical Recorded Future Risk Score. This represents a 14% decrease from last month.

Recent mention · Tenable Blog

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

Tenable Blog · 15 Aug 2026

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 to operational reality.Key TakeawaysTaiwan's Ministry of Digital Affairs confirmed a near-autonomous AI cyber attack in July 2026 in which autonomous agents mapped 21 connected government systems, compromised 85 accounts, and exfiltrated more than 2,564 personnel records in approximately four days.The Taiwan campaign...

Timeline

From disclosure to observed exploitation

  1. 17:51 UTC

    KEV confirmed by CVE

    Exploitation attested by an external source

  2. 16:52 UTC

    Added to CISA KEV

    Listed in the CISA Known Exploited Vulnerabilities catalog

  3. 16:58 UTC

    CVE published

    Vulnerability disclosed publicly

  4. 00:52 UTC

    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": 0.01619,
  "exploit_status": {
    "exploited_in_the_wild": true,
    "active_exploitation_observed": false
  },
  "sensor_telemetry": { "attempts": 0, "sensors": 0 }
}