CVE-2026-24283
Published: 10 March 2026
Summary
CVE-2026-24283 is a high-severity Heap-based Buffer Overflow (CWE-122) vulnerability in Microsoft Windows 11 24H2. Its CVSS base score is 8.8 (High).
Operationally, exploitation aligns with the MITRE ATT&CK technique Exploitation for Privilege Escalation (T1068); ranked at the 6.6th 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 heap-based buffer overflow vulnerability in Windows File Server by requiring timely application of vendor patches as referenced in Microsoft's advisory.
Implements memory protection mechanisms such as heap canaries, address space layout randomization, and data execution prevention to mitigate exploitation of heap-based buffer overflows.
Enforces least privilege for local user accounts, limiting the scope and access low-privileged authorized attackers have to the vulnerable Windows File Server component.
MITRE ATT&CK Enterprise TechniquesAI
Why these techniques?
Heap buffer overflow in Windows File Server directly enables local privilege escalation (T1068) by a low-privileged user, leading to arbitrary code execution.
NVD Description
Heap-based buffer overflow in Windows File Server allows an authorized attacker to elevate privileges locally.
Deeper analysisAI
CVE-2026-24283 is a heap-based buffer overflow vulnerability, classified under CWE-122, affecting the Windows File Server component. Published on 2026-03-10T18:18:18.170, it carries a CVSS v3.1 base score of 8.8 (AV:L/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H), indicating high severity due to its potential for significant impact across confidentiality, integrity, availability, and scope escalation.
A low-privileged local user with authorized access can exploit this vulnerability through low-complexity techniques requiring no user interaction. Successful exploitation allows the attacker to elevate privileges, achieving high-impact outcomes such as arbitrary code execution, data exfiltration, system modification, and denial of service within the elevated scope.
Microsoft's advisory provides details on mitigation and patching via the update guide at https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-24283.
Details
- CWE(s)