Description

Heap-based buffer overflow in Windows Remote Access API allows an authorized attacker to elevate privileges locally.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "7.8",
  "pubDate": "2026-08-11T17:18:55.000Z",
  "pubdate": "2026-08-11T17:18:55.000Z",
  "executiveSummary": "This vulnerability is a heap-based buffer overflow affecting the Windows Remote Access API, which permits local privilege escalation by authorized attackers.\nThe flaw exists within memory management operations inside the vulnerable component, where improper bounds checking during data processing allows malicious input to overwrite adjacent heap memory regions.\nSuccessful exploitation of this security defect allows a threat actor with local execution capabilities to execute arbitrary code with elevated privileges, potentially compromising the entire host operating system.\nThe risk implications are severe due to the potential for complete local system takeover from a standard user context.\nExploitation requirements dictate that the attacker must already possess local access to the target system and authorization to interact with the Windows Remote Access API.\nNo specific software version numbers or CVE identifiers were provided in the baseline description beyond the affected product and vulnerability mechanics.",
  "technicalDetails": "The root cause of the vulnerability is a heap-based buffer overflow residing in the Windows Remote Access API.\nThe vulnerable component fails to properly validate the size of input data before copying it into dynamically allocated heap memory buffers, leading to memory corruption.\nAttackers with local access can interact with the Windows Remote Access API to supply maliciously crafted inputs designed to exceed the allocated boundaries of the target heap buffer.\nDuring execution, the oversized data spills over into adjacent heap structures, overwriting critical control data, function pointers, or application state objects.\nThis memory corruption is leveraged by the payload to hijack control flow, redirecting execution to malicious shellcode or arbitrary routines supplied by the attacker.\nBecause the affected Windows Remote Access API executes within a privileged context, the injected payload inherits those elevated permissions upon successful execution.\nAuthentication requirements involve the attacker possessing local access and sufficient authorization to interface with the API, though exploitation results in vertical privilege escalation.\nNetwork exposure is strictly local, as the attack vector requires local execution on the target machine rather than remote network interaction.\nPost-exploitation impact includes the execution of arbitrary commands with elevated system privileges, disabling security controls, creating persistent administrative accounts, and full compromise of the underlying operating system integrity."
}