CVE-2026-33516
xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. 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
- Passive
What an attacker can affect
- Confidentiality
- High
- Integrity
- High
- Availability
- High
Exploit likelihood
What each source reports
CVE List Score used
7.7
xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
- Record
CVE-2026-33516- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-125
- Updated
- 2026-11-02
EUVDEUVD-2026-23515
7.7
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
- Record
EUVD-2026-23515- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Updated
- 2026-11-02
NVD
7.7
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
- Record
CVE-2026-33516- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/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
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - Weakness
- CWE-125
- Updated
- 2026-11-02
OSVALPINE-CVE-2026-33516
9.1
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
- Record
ALPINE-CVE-2026-33516- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-03
OSV
7.7
xrdp: Pre-authentication out-of-bounds reads in RDP capability and channel parsers
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
- Record
CVE-2026-33516- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - Weakness
- CWE-125
- Updated
- 2026-11-02
OSVDEBIAN-CVE-2026-33516
9.1
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
- Record
DEBIAN-CVE-2026-33516- CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-02
OSVUBUNTU-CVE-2026-33516
7.7
xrdp is an open source RDP server. Versions through 0.10.5 contain an out-of-bounds read vulnerability during the RDP capability exchange phase. The issue occurs when memory is accessed before validating the remaining buffer length. A remote, unauthenticated attacker can trigger this vulnerability by sending a specially crafted Confirm Active PDU. Successful exploitation could lead to a denial of service (process crash) or potential disclosure of sensitive information from the process memory. This issue has been fixed in version 0.10.6.
- Record
UBUNTU-CVE-2026-33516- CVSS 4.0
- 7.7 High
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N - CVSS 3.1
- 9.1 Critical
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - Updated
- 2026-11-02
Affected products
Affected packages
| Package | Affected | Fixed |
|---|---|---|
xrdpAlpine:v3.23 |
before 0.10.6-r0 | 0.10.6-r0 |
xrdpAlpine:v3.24 |
before 0.10.6-r0 | 0.10.6-r0 |
xrdpDebian: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 |
xrdpDebian: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 |
xrdpDebian: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 less0.10.4.1-10.10.4.1-20.10.5-10.10.5-20.10.5-30.10.5-40.10.5-5 |
0.10.6-1 |
xrdpUbuntu: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 |
xrdpUbuntu: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 |
xrdpUbuntu: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 less0.9.4-50.9.5-10.9.5-1build10.9.5-20.9.5-2ubuntu0.1~esm10.9.5-2ubuntu0.1~esm20.9.5-2ubuntu0.1~esm3 |
None known |
xrdpUbuntu: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 |
xrdpUbuntu: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 less0.9.17-2ubuntu2+esm10.9.17-2ubuntu30.9.17-2ubuntu3+esm10.9.17-2ubuntu3+esm20.9.17-2ubuntu3.1 |
None known |
Show 4 moreShow less
| Package | Affected | Fixed |
|---|---|---|
xrdpUbuntu: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 |
xrdpUbuntu: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 |
xrdpUbuntu:26.10 |
All versions, plus listed versions 0.10.1-4.10.10.6.1-2ubuntu1 |
None known |
xrdpUbuntu: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 |
History
| Recorded | Changed | Sources |
|---|---|---|
| affected, aliases, references | OSV | |
| first indexed | CVE List, EUVD, NVD, OSV |
Dates are when Every CVE recorded each change. Upstream dates may differ.
In short
CVE-2026-33516 is a high vulnerability (CVSS 7.7) 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 0.43%, the 37th percentile. Fixed in xrdp 0.10.6-r0.
References
github.com/neutrinolabs/xrdp/security/advisories/GHSA-rvh9-9wm3-28c7
github.com/neutrinolabs/xrdp/releases/tag/v0.10.6
security.alpinelinux.org/vuln/CVE-2026-33516
github.com/CVEProject/cvelistV5/tree/main/cves/2026/33xxx/CVE-2026-33516.json
nvd.nist.gov/vuln/detail/CVE-2026-33516
security-tracker.debian.org/tracker/CVE-2026-33516
ubuntu.com/security/CVE-2026-33516
cve.org/CVERecord?id=CVE-2026-33516