CVE-2026-41521
xrdp integer overflow in vnc-any mode allows heap info leak or DoS (unauthenticated).
Is CVE-2026-41521 being exploited?
Not confirmed. CVE-2026-41521 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 0.39% probability of exploitation in the next 30 days.
How severe is CVE-2026-41521?
CVE-2026-41521 is rated High. 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-2026-41521?
Yes. A fix has been recorded for CVE-2026-41521. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-41521 affect?
CVE-2026-41521 affects xrdp <= 0.10.6, xrdp vnc-any connection mode, Linux systems running xrdp RDP servers. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-41521?
Upgrade to xrdp 0.10.6.1+ and restrict/trust VNC server connections.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated remote attacker using a malicious VNC server can trigger integer overflow, causing out-of-bounds read leading to heap data disclosure or process crash (DoS).
Patch when possible
- affected< 0.10.6.1
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.