CVE-2026-71336

8.8

Microsoft · Windows Work Folder Service

An integer overflow vulnerability in the Windows Work Folder Service allows an authenticated attacker to achieve remote code execution.

Executive summary

An authenticated remote code execution vulnerability in the Windows Work Folder Service poses a high risk to organizational infrastructure.

Vulnerability

This is an integer overflow or wraparound vulnerability (CWE-190) within the Windows Work Folder Service. An authenticated attacker with low privileges can trigger this flaw over a network to execute arbitrary code.

Business impact

Successful exploitation of this vulnerability grants an attacker the ability to execute code on the target system, potentially leading to full system compromise. With a CVSS score of 8.8, this flaw represents a significant threat to data confidentiality, integrity, and system availability. Unauthorized access at this level can facilitate lateral movement within the network and exfiltration of sensitive organizational information.

Remediation

Immediate Action: Administrators must apply the security updates provided in the Microsoft Update Guide for the specific Windows versions identified above.

Proactive Monitoring: Review system and application logs for abnormal behavior or unexpected process creation associated with the Work Folder Service.

Compensating Controls: Restrict network access to the Work Folder Service to trusted users and endpoints to minimize the attack surface until patches are deployed.

Exploitation status

Public Exploit Available: No (exploit_available: false).

Analyst recommendation

Given the severity of this remote code execution flaw, organizations should prioritize the deployment of the vendor provided security updates across all affected server and workstation instances. Failure to patch these systems leaves them vulnerable to potential exploitation by an attacker who has gained initial access to the internal network. Testing and deployment should be conducted immediately to maintain a secure environment.

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History

  1. Disclosed CVE record published
  2. Collected by CVE Brief via github
  3. Analyst report written
  4. Published in the daily brief high section

Sources