CVE-2025-59282 Overview
CVE-2025-59282 is a race condition vulnerability in Microsoft Windows Inbox Component Object Model (COM) objects. The flaw stems from concurrent execution using a shared resource with improper synchronization, classified under [CWE-362]. An unauthorized local attacker can exploit the timing window to execute arbitrary code on affected systems. Successful exploitation requires user interaction and high attack complexity, but yields high impact across confidentiality, integrity, and availability. Microsoft published the advisory through the Microsoft Security Response Center (MSRC) and the issue affects a broad set of Windows client and server releases.
Critical Impact
Successful exploitation of CVE-2025-59282 allows a local attacker to win a race condition in Inbox COM Objects and execute arbitrary code on the affected Windows host.
Affected Products
- Microsoft Windows 10 (1507, 1607, 1809, 21H2, 22H2)
- Microsoft Windows 11 (22H2, 23H2, 24H2, 25H2)
- Microsoft Windows Server 2008, 2012, 2016, 2019, 2022, 2022 23H2, and 2025
Discovery Timeline
- 2025-10-14 - CVE-2025-59282 published to NVD
- 2026-02-10 - Last updated in NVD database
Technical Details for CVE-2025-59282
Vulnerability Analysis
The vulnerability resides in Windows Inbox COM Objects, which are built-in COM components shipped with the operating system. These components handle inter-process communication and object instantiation for many Windows subsystems. Improper synchronization between concurrent threads accessing a shared resource creates a Time-of-Check to Time-of-Use (TOCTOU) condition. An attacker who wins the race can manipulate object state between validation and use, redirecting execution flow to attacker-controlled code.
Exploitation requires local access and user interaction, which raises the attack complexity. However, the impact spans full compromise of confidentiality, integrity, and availability on the affected host. The current EPSS probability sits at 0.428%, placing it in the 62nd percentile of published CVEs.
Root Cause
The root cause is a [CWE-362] race condition in the synchronization logic of one or more Inbox COM Objects. Multiple threads access a shared resource without adequate locking or atomic operations. The vulnerable code window allows an attacker thread to modify the resource between the validation step and the consumption step, breaking invariants the COM object depends on.
Attack Vector
An attacker must first obtain local execution on the target system, typically through a malicious application or a user-opened file. The attacker then triggers concurrent calls into the vulnerable COM interface while racing to modify the shared resource at the precise moment of use. When the race is won, the COM object operates on attacker-controlled data, leading to arbitrary code execution in the context of the calling process. No verified public exploit code or proof-of-concept is currently listed for this CVE, and it does not appear on the CISA Known Exploited Vulnerabilities catalog.
Detection Methods for CVE-2025-59282
Indicators of Compromise
- Unexpected child processes spawned from dllhost.exe, svchost.exe, or other COM surrogate hosts following user-initiated file or application launches.
- Anomalous loading of Inbox COM Object DLLs by non-standard caller processes.
- Crash dumps or Windows Error Reporting events referencing COM components with access violations consistent with race-window exploitation.
Detection Strategies
- Monitor process creation and module load telemetry for unusual chains involving COM activation, especially where a low-privilege user process triggers high-frequency COM instantiation.
- Hunt for thread-creation patterns indicative of race-condition exploitation, such as rapid parallel calls into the same COM interface from a single user process.
- Correlate user-interaction events (document opens, archive extractions) with subsequent COM-related anomalies on the same host.
Monitoring Recommendations
- Enable Microsoft-Windows-COM and Microsoft-Windows-DistributedCOM event channels and forward them to a centralized logging platform.
- Track baseline CPU and thread counts for COM surrogate processes and alert on outliers that may indicate race-window brute forcing.
- Review the Vicarius Detection Script for CVE-2025-59282 for a community-published detection approach.
How to Mitigate CVE-2025-59282
Immediate Actions Required
- Apply the Microsoft security update for CVE-2025-59282 to all affected Windows client and server systems as referenced in the Microsoft CVE-2025-59282 Update Guide.
- Prioritize patching multi-user systems, terminal servers, and shared workstations where local attackers are most likely to obtain initial footholds.
- Restrict local user privileges and enforce application allowlisting to limit which binaries can invoke Inbox COM Objects.
Patch Information
Microsoft has published patches through the standard Windows Update channels. Consult the Microsoft CVE-2025-59282 Update Guide for the KB articles that map to each affected build of Windows 10, Windows 11, and Windows Server. Apply the cumulative update that corresponds to the host's operating system version.
Workarounds
- No official vendor workaround is documented; applying the Microsoft patch is the recommended path.
- Reduce exposure by limiting local logon rights and removing administrator privileges from standard user accounts.
- Block execution of untrusted applications and files using Windows Defender Application Control or AppLocker policies.
- Reference the Vicarius Mitigation Script for CVE-2025-59282 for a community-published mitigation helper.
# Configuration example: verify the relevant cumulative update is installed
Get-HotFix | Sort-Object -Property InstalledOn -Descending | Select-Object -First 10
Disclaimer: This content was generated using AI. While we strive for accuracy, please verify critical information with official sources.
