CVE-2026-32089
Published: 14 April 2026
Summary
CVE-2026-32089 is a high-severity Race Condition (CWE-362) vulnerability in Microsoft Windows 10 21H2. Its CVSS base score is 7.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 13.6th percentile by exploit likelihood (below the median); it is not currently listed in the CISA KEV catalog.
The strongest mitigations our analysis identified are NIST 800-53 SI-16 (Memory Protection) and SI-2 (Flaw Remediation).
Threat & Defense at a Glance
Threat & Defense Details
Mitigating Controls (NIST 800-53 r5)AI
Directly remediates the use-after-free vulnerability in Windows Speech Brokered API by applying vendor-provided patches as specified in Microsoft's update guide.
Implements memory protection mechanisms such as DEP and ASLR to prevent unauthorized code execution from use-after-free memory corruption exploits.
Enforces least privilege to restrict the impact of local privilege escalation even if the use-after-free vulnerability is exploited.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Use-after-free in local Windows API directly enables local privilege escalation from low to high privileges without user interaction.
NVD Description
Use after free in Windows Speech Brokered Api allows an authorized attacker to elevate privileges locally.
Deeper analysisAI
CVE-2026-32089 is a use-after-free vulnerability (CWE-416, concurrent execution CWE-362) in the Windows Speech Brokered API. It affects Windows operating systems and was published on 2026-04-14T18:17:13.473 with a CVSS v3.1 base score of 7.8 (AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H).
A local attacker with low privileges (PR:L) can exploit this vulnerability due to its low attack complexity (AC:L) and lack of required user interaction (UI:N). Successful exploitation enables privilege escalation, granting high impacts on confidentiality, integrity, and availability (C:H/I:H/A:H) within the local scope (AV:L, S:U).
Microsoft's update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-32089 provides details on patches and mitigations for this vulnerability.
Details
- CWE(s)