What is CVE-2026-55639?

CVE-2026-55639 is a medium-severity vulnerability in Neutrinolabs Xrdp, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-07-20.

How severe is CVE-2026-55639?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Out-of-bounds Read in Neutrinolabs Xrdp

CVE-2026-55639

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the parsing of Client Security Data within the Client MCS Connect Initial PDU with GCC Conference Create Request during the connection sequence…

Vulnerability class: Buffer Overflow

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Neutrinolabs Xrdp — versions < 0.10.6.1

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

security-advisories@github.com (x_refsource_CONFIRM)
security-advisories@github.com (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-55639?: CVE-2026-55639 is a medium-severity vulnerability in Neutrinolabs Xrdp, classified under Out-of-bounds Read. CVSS score: 5.3/10. Published 2026-07-20.
How severe is CVE-2026-55639?: Medium severity. CVSS v3 base score is 5.3 out of 10.