CVE-2024-3596HighCVSS 7.5

CERT/CC: CVE-2024-3596 RADIUS Protocol Spoofing Vulnerability

Published
May 31, 2026
Last Modified
—

🔗 CVE IDs covered (1)

CVE-2024-3596 →

📋 Description

Why is this CERT/CC CVE included in the Security Update Guide? A vulnerability exists in the RADIUS protocol that potentially affects many products and implementations of the RFC 2865 in the UDP version of the RADIUS protocol. In brief, RADIUS protocol (RFC 2865) is susceptible to forgery attacks that can modify Access-Accept or Access-Reject RADIUS response. CERT/CC assigned a CVE ID for this vulnerability which all vendors are using for their affected products. Please see KB5040268: How to manage the Access-Request packets attack vulnerability associated with CVE-2024-3596 for information on additional steps that should be done to protect your environment from this vulnerability.

According to the CVSS metric, the attack complexity is high (AC:H). What does that mean for this vulnerability? The attacker must inject themselves into the logical network path between the target and the resource requested by the victim to read or modify network communications. This is called a machine-in-the-middle (MITM) attack.

🎯 Affected products35

  • Windows 10 Version 1607 for 32-bit Systems
  • Windows 10 Version 1607 for x64-based Systems
  • Windows 10 Version 1809 for 32-bit Systems
  • Windows 10 Version 1809 for x64-based Systems
  • Windows 10 Version 21H2 for 32-bit Systems
  • Windows 10 Version 21H2 for ARM64-based Systems
  • Windows 10 Version 21H2 for x64-based Systems
  • Windows 10 Version 22H2 for 32-bit Systems
  • Windows 10 Version 22H2 for ARM64-based Systems
  • Windows 10 Version 22H2 for x64-based Systems
  • Windows 10 for 32-bit Systems
  • Windows 10 for x64-based Systems
  • Windows 11 Version 22H2 for ARM64-based Systems
  • Windows 11 Version 22H2 for x64-based Systems
  • Windows 11 Version 23H2 for ARM64-based Systems
  • Windows 11 Version 23H2 for x64-based Systems
  • Windows 11 version 21H2 for ARM64-based Systems
  • Windows 11 version 21H2 for x64-based Systems
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1
  • Windows Server 2008 R2 for x64-based Systems Service Pack 1 (Server Core installation)
  • Windows Server 2008 for 32-bit Systems Service Pack 2
  • Windows Server 2008 for 32-bit Systems Service Pack 2 (Server Core installation)
  • Windows Server 2008 for x64-based Systems Service Pack 2
  • Windows Server 2008 for x64-based Systems Service Pack 2 (Server Core installation)
  • Windows Server 2012
  • Windows Server 2012 (Server Core installation)
  • Windows Server 2012 R2
  • Windows Server 2012 R2 (Server Core installation)
  • Windows Server 2016
  • Windows Server 2016 (Server Core installation)
  • +5 more not shown

✅ Remediation

KB5040430 (Security Update) — fixed build 10.0.17763.6054 KB5040437 (Security Update) — fixed build 10.0.20348.2582 KB5040431 (Security Update) — fixed build 10.0.22000.3079 KB5040427 (Security Update) — fixed build 10.0.19044.4651 KB5040442 (Security Update) — fixed build 10.0.22621.3880 KB5040427 (Security Update) — fixed build 10.0.19045.4651 KB5040442 (Security Update) — fixed build 10.0.22631.3880 KB5040438 (Security Update) — fixed build 10.0.25398.1009 KB5040448 (Security Update) — fixed build 10.0.10240.20710 KB5040434 (Security Update) — fixed build 10.0.14393.7159 KB5040499 (Monthly Rollup) — fixed build 6.0.6003.22769 KB5040490 (Security Only) — fixed build 6.0.6003.22769 KB5040497 (Monthly Rollup) — fixed build 6.1.7601.27219 KB5040498 (Security Only) — fixed build 6.1.7601.27219 KB5040485 (Monthly Rollup) — fixed build 6.2.9200.24975 KB5040456 (Monthly Rollup) — fixed build 6.3.9600.22074

🔗 References (29)