CVE-2026-111379 FreeRDP CVE debrief

Who should care

Defenders responsible for FreeRDP deployments should assess exposure and prioritize patching to prevent exploitation. This includes verifying FreeRDP versions and applying patches to prevent local attackers from corrupting memory. Defenders must also review compensating controls for exposed systems while remediation is scheduled and verified. Additionally, defenders should monitor for suspicious activity and track exceptions, retest remediated assets, and

Why it matters

CVE-2026-111379 FreeRDP heap buffer overflow vulnerability allows local attackers to corrupt memory. Defenders should prioritize verifying FreeRDP versions and applying patches.

• Local attackers may corrupt memory by supplying a crafted v3 persistent cache file
• Defenders must verify FreeRDP versions and apply patches to prevent exploitation
• Successful exploitation may lead to code execution

Technical summary

FreeRDP before 3.32.0 contains a heap buffer overflow vulnerability in persistent_cache_read_entry_v3 that allows local attackers to corrupt memory by supplying a crafted v3 persistent cache file. This vulnerability can potentially lead to code execution. The vulnerability is caused by a wrap in the size calculation in persist_cache_get_data, which can cause fread to overflow an undersized buffer. Defenders should prioritize verifying FreeRDP versions and applying patches to prevent local attackers from exploiting the heap buffer overflow vulnerability.

Defensive priority

Defenders should prioritize verifying FreeRDP versions and applying patches to prevent local attackers from exploiting the heap buffer overflow vulnerability.

Recommended defensive actions

• Verify FreeRDP versions and apply patches to prevent exploitation
• Restrict access to sensitive data and systems
• Monitor for suspicious activity
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up

Evidence notes

The CVE record and NVD entry provide details on the heap buffer overflow vulnerability in FreeRDP before 3.32.0. The vulnerability allows local attackers to corrupt memory by supplying a crafted v3 persistent cache file.

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.