CVE-2026-111378 FreeRDP CVE debrief

Who should care

System administrators and security teams responsible for managing and securing FreeRDP implementations should be aware of this vulnerability and take steps to mitigate it. This includes reviewing and applying patches, implementing network-based detection and prevention measures, and monitoring server performance and memory usage for signs of potential exploitation.

Why it matters

CVE-2026-111378 is a high-severity vulnerability in FreeRDP that allows unauthenticated attackers to exhaust server memory, potentially leading to denial-of-service (DoS) attacks. System administrators and security teams should review and apply patches, implement network-based detection and prevention measures, and monitor server performance and memory usage to mitigate this vulnerability.

• Potential denial-of-service (DoS) attacks against vulnerable servers
• Memory exhaustion and potential server crashes
• Increased risk of exploitation due to publicly available exploit information
• Need for patching and remediation efforts to prevent exploitation

Technical summary

The vulnerability is caused by an uncontrolled resource consumption issue in the `parse_nla_mode_pdu` function of FreeRDP. This issue can be exploited by sending specially crafted RDP packets to a vulnerable server, causing the server to consume excessive memory and potentially leading to a crash or other stability issues. The vulnerability has a CVSS score of 8.7 and is considered high-severity. Affected product deployments should be reviewed and patched to prevent potential denial-of-service (DoS) attacks. FreeRDP versions 3.0.0 to 3.31.0 are vulnerable, and administrators should ensure that all instances are updated to version 3.32.0 or later.

Defensive priority

High

Recommended defensive actions

• Review and apply patches for FreeRDP versions 3.0.0 to 3.31.0
• Implement network-based detection and prevention measures to identify and block suspicious RDP traffic
• Monitor server performance and memory usage for signs of potential exploitation
• Consider implementing additional security controls, such as rate limiting or IP blocking, to prevent exploitation
• Conduct a thorough review of system configurations and ensure that all instances of FreeRDP are updated to version 3.32.0 or later
• Verify that all system administrators and security teams are aware of the vulnerability and its potential impacts
• Perform regular security audits to identify and address potential vulnerabilities in FreeRDP implementations

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, including its description, CVSS score, and affected versions. However, the corpus does not provide information on confirmed exploitation or specific attack vectors.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.