CVE-2026-55194
Heap overflow in FreeRDP gateway response handling enabling potential remote code execution.
Is CVE-2026-55194 being exploited?
Not confirmed. CVE-2026-55194 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.46% probability of exploitation in the next 30 days.
How severe is CVE-2026-55194?
CVE-2026-55194 is rated High with a CVSS score of 8.7. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-55194?
Yes. A fix has been recorded for CVE-2026-55194. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-55194 affect?
CVE-2026-55194 affects FreeRDP < 3.27.0, Applications and devices linking libfreerdp gateway client. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-55194?
Upgrade FreeRDP to >=3.27.0; restrict and monitor TS Gateway access; apply network ACLs for untrusted gateways.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Malicious TS Gateway can send crafted response to trigger heap overflow, crash clients and potentially achieve remote code execution via heap corruption.
Immediate action required
- affected< 3.27.0
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.