What is CVE-2026-33689?

CVE-2026-33689 is a critical-severity vulnerability in Neutrinolabs Xrdp, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-04-17.

How severe is CVE-2026-33689?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Out-of-bounds Read in Neutrinolabs Xrdp

CVE-2026-33689

xrdp is an open source RDP server. Versions through 0.10.5 have an out-of-bounds read vulnerability in the pre-authentication RDP message parsing logic. A remote, unauthenticated attacker can trigger this flaw by sending a specially crafte…

Vulnerability class: Buffer Overflow

EPSS: 0.005 (38.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Neutrinolabs Xrdp — versions < 0.10.6

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC, Release Notes)

Frequently asked questions

What is CVE-2026-33689?: CVE-2026-33689 is a critical-severity vulnerability in Neutrinolabs Xrdp, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2026-04-17.
How severe is CVE-2026-33689?: Critical severity. CVSS v3 base score is 9.1 out of 10.