CVE-2026-109949 FreeRDP CVE debrief

Who should care

Defenders responsible for FreeRDP installations should assess exposure and prioritize remediation to prevent potential PIN brute-force attacks. This includes operators, platform administrators, vulnerability management teams, and security teams who manage FreeRDP deployments.

Why it matters

Defenders should prioritize verifying and remediating FreeRDP installations to prevent potential PIN brute-force attacks.

• Verify and remediate FreeRDP installations to prevent potential PIN brute-force attacks.
• Implement additional security measures to prevent PIN brute-force attacks.
• Monitor for suspicious activity related to RDP connections.

Technical summary

FreeRDP 3.0.0 before 3.32.0 contains an improper restriction of excessive authentication attempts in its virtual smartcard GIDS implementation. A malicious RDP server can exhaust the counter with VERIFY APDUs, then request a new SCardConnect to reset attempts, enabling unbounded online brute-forcing of the configured smartcard PIN. This vulnerability affects FreeRDP installations and defenders should assess exposure and prioritize remediation to prevent potential PIN brute-force attacks. The vulnerability is related to the virtual smartcard GIDS implementation and can be exploited by a malicious RDP server.

Defensive priority

Defenders should prioritize verifying and remediating FreeRDP installations to prevent potential PIN brute-force attacks.

Recommended defensive actions

• Verify FreeRDP installations and ensure they are up-to-date with the latest security patches.
• Implement additional security measures to prevent PIN brute-force attacks.
• Monitor for suspicious activity related to RDP connections.
• 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 source item provide details on the vulnerability in FreeRDP 3.0.0 before 3.32.0. The NVD entry is currently not provided. Evidence is limited to publicly available information and defenders should verify the vulnerability with official sources and assess exposure. The CVE Program record and NVD detail page provide additional context.

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.