DEBIAN-CVE-2026-55639

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Source
https://security-tracker.debian.org/tracker/CVE-2026-55639
Import Source
https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55639.json
JSON Data
https://api.osv.dev/v1/vulns/DEBIAN-CVE-2026-55639
Upstream
Published
2026-07-20T18:16:54Z
Modified
2026-09-14T17:03:45Z
Severity
  • 5.3 (Medium) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N CVSS Calculator
Summary
[none]
Details

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. During the initial capability and security negotiation phase, the parser fails to perform sufficient length validation for the incoming data block. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed data. Due to missing bounds checks, the xrdp process may read a small number of bytes beyond the declared data block boundary, potentially disclosing process memory contents that could be combined with other vulnerabilities. This issue has been fixed in version 0.10.6.1.

References

Affected packages

Debian:12 / xrdp

Package

Name
xrdp
Purl
pkg:deb/debian/xrdp?arch=source&distro=bookworm

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.9.21.1-1+deb12u3

Affected versions

0.*
0.9.21.1-1
0.9.21.1-1+deb12u1
0.9.21.1-1+deb12u2

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55639.json"

Debian:13 / xrdp

Package

Name
xrdp
Purl
pkg:deb/debian/xrdp?arch=source&distro=trixie

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.10.1-3.1+deb13u2

Affected versions

0.*
0.10.1-3.1
0.10.1-3.1+deb13u1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55639.json"

Debian:14 / xrdp

Package

Name
xrdp
Purl
pkg:deb/debian/xrdp?arch=source&distro=forky

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
0.10.6.1-2

Affected versions

0.*
0.10.1-3.1
0.10.1-4
0.10.1-4.1
0.10.2-1
0.10.2-2
0.10.4.1-1
0.10.4.1-2
0.10.5-1
0.10.5-2
0.10.5-3
0.10.5-4
0.10.5-5
0.10.6-1
0.10.6-2
0.10.6-3
0.10.6-4
0.10.6-5
0.10.6.1-1
0.10.6.1-2~bpo13+1

Ecosystem specific 

{
    "urgency":  "not yet assigned"
}

Database specific

source 
"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-55639.json"