CVE-2026-83522

Analyzed Analyzed - Analysis Complete

Windows IKE Extension Security Decision Spoofing

Publication date: 2026-10-13

Last updated on: 2026-10-29

Assigner: Microsoft Corporation

Description

Reliance on untrusted inputs in a security decision in Windows IKE Extension allows an unauthorized attacker to perform spoofing over a network.

CVSS Scores

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Meta Information

Published

2026-10-13

Last Modified

2026-10-29

Generated

2026-11-08

AI Q&A

2026-10-14

EPSS Evaluated

2026-11-07

NVD

CVE-2026-83522

EUVD

EUVD-2026-99912

Affected Vendors & Products

Vendor	Product	Version / Range
microsoft	windows_server_2012	r2
microsoft	windows_server_2012	*
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1607	to 10.0.14393.9612 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_1809	to 10.0.17763.9376 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_10_21h2	to 10.0.19044.7807 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_23h2	to 10.0.22631.7652 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_24h2	to 10.0.26100.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_25h2	to 10.0.26200.9711 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h1	to 10.0.28000.3231 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_11_26h2	to 10.0.26300.9711 (exc)
microsoft	windows_server_2025	to 10.0.26100.33650 (exc)
microsoft	windows_server_2022	to 10.0.20348.5761 (exc)
microsoft	windows_server_2016	to 10.0.14393.9612 (exc)
microsoft	windows_server_2019	to 10.0.17763.9376 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)
microsoft	windows_10_22h2	to 10.0.19045.7807 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-807	The product uses a protection mechanism that relies on the existence or values of an input, but the input can be modified by an untrusted actor in a way that bypasses the protection mechanism.

Attack-Flow Graph

Executive Summary

This vulnerability involves Windows IKE Extension relying on untrusted inputs for security decisions. An unauthorized attacker can exploit this to perform spoofing attacks over a network.

Impact Analysis

An attacker could impersonate legitimate systems or users, potentially gaining unauthorized access to resources or intercepting sensitive communications.

Compliance Impact

This vulnerability enables spoofing attacks due to reliance on untrusted inputs in Windows IKE Extension, which could allow unauthorized network access. Such attacks may compromise data integrity and confidentiality, potentially violating GDPR's security requirements (Article 32) and HIPAA's integrity and access controls (45 CFR 164.312).

Mitigation Strategies

Apply the latest security updates from Microsoft to patch the Windows IKE Extension vulnerability. Monitor Microsoft's security advisories for updates and ensure all affected systems are updated promptly.

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EPSS Chart

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