VulnerabilityBleeping Computer
9.8 — CRITICAL
Critical RCE flaw in Windows IKE Extension now actively exploited
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) warned that hackers are exploiting a critical-severity remote code execution (RCE) flaw in the Windows Internet Key Exchange (IKE) Service Extensions component. [...]
🤖 AI BriefingAuto-generated threat analysis
🔍Threat Overview
A critical-severity remote code execution (RCE) flaw in the Windows Internet Key Exchange (IKE) Service Extensions component is being actively exploited, allowing attackers to execute code over a network without privileges.
⚙️Technical Details
CVEs
CVE-2026-33824
Affected Systems
Microsoft Windows 10 1607Microsoft Windows 10 1809Microsoft Windows 10 21H2Microsoft Windows 10 22H2Microsoft Windows 11 23H2
Attack Vectors
NETWORK
💥Impact Assessment
Severity: CRITICAL
Who Is at Risk
U.S. Federal Civilian Executive Branch (FCEB) agencies and other organizations with supported Windows systems
🛡️Recommended Actions
1Block inbound traffic through UDP ports 500 and 4500 on unpatched systems
2Configure firewall rules to allow inbound traffic only from known peer addresses when IKE is used
3Prioritize patching the CVE-2026-33824 security flaw as soon as possible
📦Affected Products
Microsoft Windows 10 1607Microsoft Windows 10 1809Microsoft Windows 10 21H2Microsoft Windows 10 22H2Microsoft Windows 11 23H2Microsoft Windows 11 24H2Microsoft Windows 11 25H2Microsoft Windows 11 26H1Microsoft Windows Server 2016Microsoft Windows Server 2019
🔐NVD Verified DataVERIFIED
CVE-2026-33824 ↗CVSS 9.8 — CRITICAL
Attack Vector
NETWORK
Complexity
LOW
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWeaknesses
CWE-415
Affected Products (CPE)
Microsoft Windows 10 1607Microsoft Windows 10 1809Microsoft Windows 10 21H2Microsoft Windows 10 22H2Microsoft Windows 11 23H2
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