ID :ISA-2026-025
Normal alertActiveCVSS 4.3/10IservicesCSIRT

Identity theft vulnerability affecting Microsoft Windows

Executive Summary

A vulnerability affecting Microsoft Windows would allow a malicious actor to access sensitive information on affected systems.

Published on April 30, 2026 at 01:00 AM by Iservices Csirt14 views

Description

Technical context and vulnerability details

Microsoft Windows is a family of operating systems developed and marketed by Microsoft. This system is affected by a vulnerability labeled CVE-2026-32202 resulting from a failure of protection mechanisms designed to prevent unauthorized actions on a network. Exploitation of this vulnerability would allow an unauthenticated malicious actor to impersonate a legitimate entity to submit falsified network requests, potentially leading to unauthorized access and manipulation of sensitive data within affected systems. It is classified as medium with a severity score of 4.3 according to CVSS V3.1.

Potential Risks & Impact

Potential consequences upon exploitation

  • Data privacy breach;
  • Data integrity breach;
  • Compromise of system integrity;

Affected systems

Products, components and targeted versions

  • Versions of Microsoft Windows that do not have the April 2026 security patches, i.e.:;
  • Windows 10;
  • Version 1607 (x86, x64): versions strictly before 10.0.14393.9060;
  • Version 1809 (x86, x64): versions strictly before 10.0.17763.8644;
  • Version 21H2 (x86, x64, ARM64): versions strictly prior to 10.0.19044.7184;
  • Version 22H2 (x86, x64, ARM64): versions strictly prior to 10.0.19045.7184;
  • Windows 11;
  • Version 23H2 (x64, ARM64): versions strictly prior to 10.0.22631.6936;
  • Version 24H2 (x64, ARM64): versions strictly prior to 10.0.26100.8246;
  • Version 25H2 (x64, ARM64): versions strictly prior to 10.0.26200.8246;
  • Version 26H1 (x64, ARM64): versions strictly prior to 10.0.28000.1836;
  • Windows Server;
  • Windows Server 2012 (Standard and R2): all versions;
  • Windows Server 2016: versions strictly before 10.0.14393.9060;
  • Windows Server 2019: versions strictly before 10.0.17763.8644;
  • Windows Server 2022: versions strictly before 10.0.20348.5020;
  • Windows Server 2022 (23H2): versions strictly before 10.0.25398.2274;
  • Windows Server 2025: versions strictly before 10.0.26100.32690;
  • Windows 10 version 21H2 (x86, x64, ARM64);
  • Windows 10 version 22H2 (x86, x64, ARM64);

Recommended Remediations & Actions

Immediate actions and recommended mitigations

  • Update Microsoft Windows to its latest stable version;
  • Block outgoing SMB flows (TCP port 445) to external networks or the Internet at the firewall level;

Advisory Specifications

ISA-2026-025
CVSS scoreMEDIUM
4.3/ 10.0
0.0 (Low)5.0 (Med)10.0 (Crit)
PriorityNormal
StatusActive
Typesecurite
Published onApril 30, 2026 at 01:00 AM
OrigineIservicesCSIRT
Audience14 views

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