CVE-2026-67292 FreeRDP CVE debrief

Who should care

Defenders responsible for systems using FreeRDP should assess exposure and prioritize verification and remediation. Defenders should care about CVE-2026-67292 because it affects FreeRDP, a widely used remote desktop protocol implementation. The vulnerability can lead to potential information disclosure and denial of service (DoS) attacks. Defenders responsible for systems using FreeRDP should review and update affected systems and configurations.

Why it matters

Defenders should care about CVE-2026-67292 because it affects FreeRDP, a widely used remote desktop protocol implementation. The vulnerability can lead to potential information disclosure and denial of service (DoS) attacks. Defenders responsible for systems using FreeRDP should assess exposure and prioritize verification and remediation.

• Potential information disclosure due to buffer over-disclosure
• Denial of service (DoS) via zero-length Ping payload

Technical summary

The vulnerability exists in the gateway WebSocket transport of FreeRDP, specifically in the libfreerdp/core/gateway/websocket.c file. The client's Pong reply reuses a fixed 1024-byte response stream whose length is not sealed to the actual received Ping payload. A malicious gateway/WebSocket peer sending a non-empty Ping control frame causes the client to reply with an overlong Pong that discloses bytes beyond the received payload. This can lead to potential information disclosure and denial of service (DoS) attacks.

Defensive priority

Defenders should prioritize verifying and upgrading to version 3.29.0 or later of FreeRDP to prevent potential information disclosure.

Recommended defensive actions

• Verify and upgrade to version 3.29.0 or later of FreeRDP
• Review and update affected systems and configurations
• Monitor for potential exploitation attempts
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance
• Plan vendor-supported updates or mitigations through normal change control where exposure is confirmed
• Check relevant monitoring, detection, and logs for exposed assets that need extra review

Evidence notes

The CVE record and NVD entry provide details about the vulnerability, including its description and affected versions. FreeRDP is a widely used remote desktop protocol implementation. Defenders should verify and review affected systems and configurations. The vulnerability exists in the gateway WebSocket transport of FreeRDP, specifically in the libfreerdp/core/gateway/websocket.c file. The client's Pong reply reuses a fixed 1024-byte response stream whose length is not sealed to the actual received Ping payload. A malicious gateway/

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.