CVE-2026-104935: Microsoft Windows command injection in Shell

CVE-2026-104935 · Severity: critical · CVSS 8.8 · Exploited in the wild · Published 2026-10-13

Microsoft Windows Shell contains a command injection vulnerability that allows attackers to bypass security features and execute unauthorized commands over the network. An attacker exploiting this flaw could gain the ability to run arbitrary code on affected systems, potentially leading to data theft, system compromise, or lateral movement within a network. This vulnerability is actively being exploited in the wild.

Technologies: Microsoft Windows, 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 11 26h2, Microsoft Windows Server 2012, Microsoft Windows Server 2016, Microsoft Windows Server 2019, Microsoft Windows Server 2022, Microsoft Windows Server 2025. Vendors: Microsoft.

Quick answers

Is CVE-2026-104935 exploited in the wild?
Yes. CVE-2026-104935 is known to be exploited in the wild, first recorded on 13 October 2026. Treat it as urgent.
How severe is CVE-2026-104935?
Critical severity, with a CVSS score of 8.8, published 13 October 2026.
Which products and versions are affected?
Microsoft Windows.
Is there a fix for CVE-2026-104935?
No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.
How is CVE-2026-104935 attacked?
It is attacked over the network, in an operating system.
Am I affected by CVE-2026-104935?
Check whether you run Microsoft Outlook Web, Microsoft Windows, Microsoft Windows 10 1607 or one of the others listed. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

Technical details

The vulnerability is a command injection flaw in Microsoft Windows Shell that can be exploited over a network to bypass security features and achieve code execution. Attack vectors include network-based exploitation without requiring user interaction or prior authentication. The vulnerability is currently being exploited in the wild.

Affected products

  • Microsoft Windows

Identifiers

  • CVE-2026-104935
  • CVE-2026-96951

Timeline

  • 2026-10-13: disclosed
  • 2026-10-13: exploited

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