CVE-2026-33824: listed in the CISA KEV catalog

CVE-2026-33824 · CVSS 9.8 CRITICAL · EPSS 2% · KEV 2026-08-18

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

Is CVE-2026-33824 exploited?

• Listed in the CISA KEV catalog on 2026-08-18.
• Federal remediation due 2026-08-21.
• Past that date by 41 days.
• EPSS puts exploitation in the next 30 days at 2%.
• Public exploit code: none found in monitored sources.

Which products and versions are affected?

• Microsoft · Windows 10 · Version 21H2
• Microsoft · Windows 10 · Version 1809
• Microsoft · Windows 10 · Version 1607
• Microsoft · Windows 11 · version 26H1
• Hitachi · Virtual Storage Platform · 5200
• Hitachi · Virtual Storage Platform · 5100
• Hitachi · Virtual Storage Platform · 5500
• Microsoft · Windows 11 · Version 25H2
• Hitachi · Virtual Storage Platform · 5100H
• Hitachi · Virtual Storage Platform · 5500H
• Microsoft · Windows 11 · Version 24H2
• Microsoft · Windows 10 · Version 22H2
• Microsoft · Windows Server 2022 · 23H2 Edition
• Microsoft · Windows 11 · Version 23H2
• Hitachi · Virtual Storage Platform · 5600H
• Hitachi · Virtual Storage Platform · 5200H
• Hitachi · Virtual Storage Platform · 5600

Is there a patch?

No patch identifier recorded here yet.

What PlainSec published about CVE-2026-33824

• CISA’s KEV Update Spans Four Live Exploits (2026-08-17)

Primary sources

• NVD record
• CISA KEV catalog

What this record does not say

• No patch identifier.

KEV and EPSS are re-checked daily. Record last updated 2026-09-24.