CVE-2026-69587Network attack vector

Unauthenticated denial of service via null dereference

Published Sep 8, 2026 · Updated Sep 9, 2026

Null pointer dereference in Microsoft Windows IKE Extension allows remote attackers to deny service over a network. The public record does not identify the malformed IKE input or the code path that dereferences the null pointer. Network access is sufficient, with no authentication or user interaction, and successful exploitation interrupts availability on the affected Windows system.

CVSS severity7.5
High
EPSS probability1.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Null pointer dereference in Microsoft Windows IKE Extension allows remote attackers to deny service over a network. The public record does not identify the malformed IKE input or the code path that dereferences the null pointer. Network access is sufficient, with no authentication or user interaction, and successful exploitation interrupts availability on the affected Windows system.

The record

CVE
CVE-2026-69587
Published
Sep 8, 2026
Updated
Sep 9, 2026
Vendor
Microsoft
Product
Windows Server 2025 (Server Core installation)
Classifications
CWE-476, T1499.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 8, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 9, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=10.0.26100.0 <10.0.26100.33438

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Microsoft · Windows Server 2025 (Server Core installation)version=10.0.26100.0 <10.0.26100.33438
Microsoft · Windows 11, version 25H2version=10.0.26200.0 <10.0.26200.9445
Microsoft · Windows 11, version 24H2version=10.0.26100.0 <10.0.26100.9445
Microsoft · Windows 11, version 26H1version=10.0.28000.0 <10.0.28000.2954
Microsoft · Windows 11 Version 23H2version=10.0.22631.0 <10.0.22631.7582
Microsoft · Windows Server 2022version=10.0.20348.0 <10.0.20348.5622
Microsoft · Windows Server 2025version=10.0.26100.0 <10.0.26100.33438

Published CVSS scores

6.5MicrosoftCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C
7.5MicrosoftCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-476NULL Pointer Dereference
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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