CVE-2026-67291
Heap out-of-bounds read in FreeRDP <=3.28.0 allows malicious RDP server to crash clients.
Is CVE-2026-67291 being exploited?
Not confirmed. CVE-2026-67291 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 0.35% probability of exploitation in the next 30 days.
How severe is CVE-2026-67291?
CVE-2026-67291 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-2026-67291?
Yes. A fix has been recorded for CVE-2026-67291. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-67291 affect?
CVE-2026-67291 affects FreeRDP <= 3.28.0, libfreerdp (glyph cache), Applications bundling FreeRDP client library. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-67291?
Upgrade FreeRDP to 3.29.0+ and block untrusted RDP servers.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Remote RDP server can trigger heap OOB read causing client crash (DoS); may leak memory contents.
Patch when possible
- affected< 3.29.0
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.