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CVE-2025-59282: Internet Information Services (IIS) Inbox COM Objects (Global Memory) Remote Code Execution Vulnerability

• Severity: high (CVSS 7.0 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-10-14 · updated 2026-06-17
• Weakness: CWE-362

Description

Concurrent execution using shared resource with improper synchronization ('race condition') in Inbox COM Objects allows an unauthorized attacker to execute code locally.

Affected products

• Microsoft Windows 10 Version 1507: before 10.0.10240.21161 — fixed in 10.0.10240.21161
• Microsoft Windows 10 1607: before 10.0.14393.8519 — fixed in 10.0.14393.8519
• Microsoft Windows 10: before 10.0.17763.7919 — fixed in 10.0.17763.7919
• Microsoft Windows 10: before 10.0.19044.6456 — fixed in 10.0.19044.6456
• Microsoft Windows 10: before 10.0.19045.6456 — fixed in 10.0.19045.6456
• Microsoft Windows 11: through 10.0.22621.6060
• Microsoft Windows 11: through 10.0.22631.6060
• Microsoft Windows 11: before 10.0.26100.6899 — fixed in 10.0.26100.6899
• Microsoft Windows 11 25H2: before 10.0.26200.6899 — fixed in 10.0.26200.6899
• Microsoft Windows Server 2008: r2-sp1
• Microsoft Windows Server 2012: r2
• Microsoft Windows Server 2016: before 10.0.14393.8519 — fixed in 10.0.14393.8519
• Microsoft Windows Server 2019: before 10.0.17763.7919 — fixed in 10.0.17763.7919
• Microsoft Windows Server 2022: before 10.0.20348.4294 — fixed in 10.0.20348.4294
• Microsoft Windows Server 2022, 23H2 Edition (Server Core installation): before 10.0.25398.1913 — fixed in 10.0.25398.1913
• Microsoft Windows Server 2025: before 10.0.26100.6899 — fixed in 10.0.26100.6899

How to fix

Upgrade to a fixed version: Microsoft Windows 10 Version 1507 10.0.10240.21161; Microsoft Windows 10 1607 10.0.14393.8519; Microsoft Windows 10 10.0.17763.7919; Microsoft Windows 10 10.0.19044.6456; Microsoft Windows 10 10.0.19045.6456; Microsoft Windows 11 10.0.26100.6899; Microsoft Windows 11 25H2 10.0.26200.6899; Microsoft Windows Server 2016 10.0.14393.8519; Microsoft Windows Server 2019 10.0.17763.7919; Microsoft Windows Server 2022 10.0.20348.4294; Microsoft Windows Server 2022, 23H2 Edition (Server Core installation) 10.0.25398.1913; Microsoft Windows Server 2025 10.0.26100.6899. Check the vendor advisory for mitigations.

References

• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2025-59282
• https://www.vicarius.io/vsociety/posts/cve-2025-59282-detection-script-race-condition-in-microsoft-inbox-com-objects
• https://www.vicarius.io/vsociety/posts/cve-2025-59282-mitigation-script-race-condition-in-microsoft-inbox-com-objects

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