CVE-2026-32202
Microsoft Windows Protection Mechanism Failure Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 12 May 2026). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
Description
Protection mechanism failure in Windows Shell allows an unauthorized attacker to perform spoofing over a network.
- CVSS 3.1
- 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N
- EPSS
- 70.90% probability · 99th percentile
- Public exploits
- 1 in Exploit-DB · first 29 May 2026
- CISA KEV
- Listed 28 April 2026 · due 12 May 2026
- Weakness
- CWE-693
- Affected
- microsoft/windows 10 1607 · microsoft/windows 10 1809 · microsoft/windows 10 21h2 · microsoft/windows 10 22h2 · microsoft/windows 11 23h2 · microsoft/windows 11 24h2 · microsoft/windows 11 25h2 · microsoft/windows 11 26h1 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · microsoft/windows server 2022 · microsoft/windows server 2022 23h2 · microsoft/windows server 2025
- Source
- secure@microsoft.com
EPSS moved from 4.9% on 24 September 2026 to 70.9% on 30 October 2026. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”.
CISA notes
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable. https://msrc.microsoft.com/update-guide/en-US/vulnerability/CVE-2026-32202 ; https://nvd.nist.gov/vuln/detail/CVE-2026-32202
Public exploits (1)
Entries in Exploit-DB that cite this CVE. Links go to the Exploit-DB page and to the file in the public repository; nothing is hosted here. A verified tick means the Exploit-DB team confirmed the exploit works against the stated version.
References
- https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32202Vendor Advisory
- https://www.vicarius.io/vsociety/posts/cve-2026-32202-detection-script-spoofing-vulnerability-in-windows-shellThird Party Advisory
- https://www.vicarius.io/vsociety/posts/cve-2026-32202-mitigation-script-spoofing-vulnerability-in-windows-shellMitigation, Third Party Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2026-32202Third Party Advisory, US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.