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CVE-2026-32624

xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length calculation

6.3 MediumFix available

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

Attack profile

How easy it is to exploit

Attack vector
Network
Complexity
Low
Privileges needed
None
User interaction
None

What an attacker can affect

Confidentiality
None
Integrity
Low
Availability
Low

Exploit likelihood

0.41%Up 0.3 points since Apr 18, 2026
90%50%10%1%

What each source reports

CVE List Score used 6.3

xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length calculation

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

Record
CVE-2026-32624
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-122
Updated
2026-11-02
EUVDEUVD-2026-23506 6.3

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

Record
EUVD-2026-23506
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Updated
2026-11-02
NVD 6.3

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

Record
CVE-2026-32624
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Weakness
CWE-122
Updated
2026-11-02
OSVALPINE-CVE-2026-32624 6.5

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

Record
ALPINE-CVE-2026-32624
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Updated
2026-11-03
OSV 6.3

xrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length calculation

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

Record
CVE-2026-32624
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
Weakness
CWE-122
Updated
2026-11-02
OSVDEBIAN-CVE-2026-32624 6.5

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

Record
DEBIAN-CVE-2026-32624
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Updated
2026-11-02
OSVUBUNTU-CVE-2026-32624 6.3

xrdp is an open source RDP server. Versions through 0.10.5 contain a heap-based buffer overflow vulnerability in its logon processing. In environments where domain_user_separator is configured in xrdp.ini, an unauthenticated remote attacker can send a crafted, excessively long username and domain name to overflow the internal buffer. This can corrupt adjacent memory regions, potentially leading to a Denial of Service (DoS) or unexpected behavior. The domain_name_separator directive is commented out by default, systems are not affected by this vulnerability unless it is intentionally configured. This issue has been fixed in version 0.10.6.

Record
UBUNTU-CVE-2026-32624
CVSS 4.0
6.3 MediumCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N
CVSS 3.1
6.5 MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:L
Updated
2026-11-02
OSVopenSUSE-SU-2026:10816-1 No score

libpainter0-0.9.27-2.1 on GA media

These are all security issues fixed in the libpainter0-0.9.27-2.1 package on the GA media of openSUSE Tumbleweed.

Record
openSUSE-SU-2026:10816-1
Updated
2026-11-02

Affected products

Affected packages

Affected packages
PackageAffectedFixed
xrdp
Alpine:v3.23
 before 0.10.6-r0
0.10.6-r0
xrdp
Alpine:v3.24
 before 0.10.6-r0
0.10.6-r0
xrdp
Debian:12
 before 0.9.21.1-1+deb12u3, plus listed versions
0.9.21.1-10.9.21.1-1+deb12u10.9.21.1-1+deb12u2
0.9.21.1-1+deb12u3
xrdp
Debian:13
 before 0.10.1-3.1+deb13u2, plus listed versions
0.10.1-3.10.10.1-3.1+deb13u1
0.10.1-3.1+deb13u2
xrdp
Debian:14
 before 0.10.6-1, plus listed versions
0.10.1-3.10.10.1-40.10.1-4.10.10.2-10.10.2-2
Show 7 moreShow less
0.10.4.1-10.10.4.1-20.10.5-10.10.5-20.10.5-30.10.5-40.10.5-5
0.10.6-1
xrdp
Ubuntu:Pro:14.04:LTS
 All versions, plus listed versions
0.6.0-10.6.0-1ubuntu0.10.6.0-1ubuntu0.1+esm10.6.0-1ubuntu0.1+esm20.6.0-1ubuntu0.1+esm3
 None known
xrdp
Ubuntu:Pro:16.04:LTS
 All versions, plus listed versions
0.6.1-20.6.1-2ubuntu0.10.6.1-2ubuntu0.30.6.1-2ubuntu0.3+esm10.6.1-2ubuntu0.3+esm20.6.1-2ubuntu0.3+esm3
 None known
xrdp
Ubuntu:Pro:18.04:LTS
 All versions, plus listed versions
0.9.1-90.9.4-10.9.4-20.9.4-30.9.4-4
Show 7 moreShow less
0.9.4-50.9.5-10.9.5-1build10.9.5-20.9.5-2ubuntu0.1~esm10.9.5-2ubuntu0.1~esm20.9.5-2ubuntu0.1~esm3
 None known
xrdp
Ubuntu:Pro:20.04:LTS
 All versions, plus listed versions
0.9.9-10.9.12-10.9.12-1ubuntu0.10.9.12-1ubuntu0.1+esm10.9.12-1ubuntu0.1+esm2
 None known
xrdp
Ubuntu:22.04:LTS
 All versions, plus listed versions
0.9.15-1ubuntu10.9.17-10.9.17-20.9.17-2ubuntu10.9.17-2ubuntu2
Show 5 moreShow less
0.9.17-2ubuntu2+esm10.9.17-2ubuntu30.9.17-2ubuntu3+esm10.9.17-2ubuntu3+esm20.9.17-2ubuntu3.1
 None known
Show 5 moreShow less
Affected packages
PackageAffectedFixed
xrdp
Ubuntu:24.04:LTS
 All versions, plus listed versions
0.9.21.1-10.9.24-20.9.24-30.9.24-3build10.9.24-3build20.9.24-40.9.24-4ubuntu0.1~esm10.9.24-4ubuntu0.1
 None known
xrdp
Ubuntu:25.10
 All versions, plus listed versions
0.10.1-30.10.1-3.10.10.1-3.1+deb13u1build0.25.10.1
 None known
xrdp
Ubuntu:26.10
 All versions, plus listed versions
0.10.1-4.10.10.6.1-2ubuntu1
 None known
xrdp
Ubuntu:26.04:LTS
 All versions, plus listed versions
0.10.1-3.10.10.1-40.10.1-4.10.10.1-4.1ubuntu0.1
 None known
xrdp
openSUSE:Tumbleweed
From an advisory covering 8 CVEs
 before 0.9.27-2.1
0.9.27-2.1

History

History
RecordedChangedSources
affected, facts
affected, aliases, referencesOSV
first indexedCVE List, EUVD, NVD, OSV

Dates are when Every CVE recorded each change. Upstream dates may differ.

In short

CVE-2026-32624 is a medium vulnerability (CVSS 6.3) in Neutrinolabs Xrdp, published April 17, 2026. No source lists public exploit code. EPSS puts the chance of exploitation in the next 30 days at 0.41%, the 35th percentile. Fixed in xrdp 0.10.6-r0.

References

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