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CVE-2026-41252· NVD / CVE Program· CNA GitHub_M

xrdp: lib_palette_update Heap Buffer Overflow & RCE

Noroxi assessment

Priority: Monitor (action score 39/100)

  • The sources we track (CISA KEV, Exploit-DB, Metasploit, Nuclei, GitHub) show no public exploit code or exploitation in the wild.
  • Probability of exploitation in the next 30 days: 1.1% (FIRST EPSS); higher than 65.3% of all records.
  • Anyone who can reach it over the internet can trigger it. No account or password is required. No user action is required. No special conditions are required; it is repeatable.
  • According to CISA the attack is automatable: targets can be found by mass scanning.
  • Fixed version: neutrinolabs xrdp 0.10.6.1.

Low priority for now. Upgrade to neutrinolabs xrdp 0.10.6.1 or later.

Generated automatically from the record's data: CVSS (NVD and CNA), CISA KEV and SSVC, FIRST EPSS, exploit sources, fixed versions. How we calculate it

Primary sources: NVD · CVE.org · FIRST EPSS

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a missing bounds check in xrdp, which allows a heap-based buffer overflow when operating in vnc-any mode. The issue occurs during the handling of RFB protocol color map messages from a VNC server, where incoming color indices are not properly validated. A malicious VNC server can exploit this flaw by sending crafted messages with out-of-range values, leading to an out-of-bounds write on the heap. This memory corruption can result in a denial of service (DoS) or potentially allow remote code execution (RCE) prior to authentication. This issue has been fixed in version 0.10.6.1.

CriticalCVSS 9.8 · v3.1—No exploit Fix available
Published
Jul 20, 2026
Updated
Jul 23, 2026
EPSS
1.1% · 65th percentile

Report tools

JSON

Action score

39

Monitor

Low priority for now.

CVSS
39 / 40 · 9.8 / 10
CISA KEV
0 / 30 · Not listed
EPSS
0 / 30 · 1.1%

CISA SSVC decision

Exploitation
none
Automatable
yes
Technical impact
total

Vulnrichment: CISA's decision-tree inputs.

CNA vs NVD score

NVD
—
CNA · GitHub_M
9.8
NVD has not scored this yet; the score shown is the CNA’s.

The score given by the assigning authority versus NVD’s independent score. A gap means the severity is contested.

Get told when this record changes

  • Not in KEV: no record of exploitation in the wild
  • No public exploit code on record
  • A fix has been released

If any of these changes, we'll tell you in the daily email digest.

Follow CVE-2026-41252

When you'll hear from us

  • when it enters CISA KEV
  • when exploit code appears or is weaponized
  • when the record is updated (including a fixed version)
  • when EPSS rises 20 points in a week

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Noroxi analysis

What does it mean in your environment?

The assessment above is generated automatically from the record's data; it doesn't know your environment. Our team verifies on your systems whether this vulnerability is actually exploitable and which mitigation is enough.

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Affected systems

Is your version affected?

Pick the product and type the version you run. It's compared with this record's version ranges in your browser; the version isn't sent anywhere.

VendorProduct
neutrinolabsxrdp

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • neutrinolabs xrdpbefore 0.10.6.1

Versions reported by the vendor

Affected version ranges reported by the assigning authority (GitHub_M). Independent of NVD's CPE analysis and usually ahead of it.

  • neutrinolabs xrdp

    • < 0.10.6.1affected

Package-level exposure

OSV and GitHub Advisory data: ecosystem, package and range. SBOM matching uses this table.

EcosystemPackageAffected rangeFix
Debian:12xrdpbefore 0.9.21.1-1+deb12u30.9.21.1-1+deb12u3
Debian:13xrdpbefore 0.10.1-3.1+deb13u20.10.1-3.1+deb13u2
Debian:14xrdpbefore 0.10.6.1-20.10.6.1-2
openSUSE:Tumbleweedxrdpbefore 0.10.6.1-1.10.10.6.1-1.1

Same product

neutrinolabs: all records

Other highest-scoring records for the same primary product.

  • CVE-2025-68670xrdp improperly checks bounds of domain string length, which leads to Stack-based Buffer Overflow
    39Monitor
  • CVE-2024-39917xrdp allows an ininite number of login attempts
    39Monitor
  • CVE-2022-23484Integer Overflow in xrdp
    39Monitor

Published before and after this one in the same product

  • ← EarlierCVE-2026-33689Apr 17, 2026 · xrdp: Pre-authentication out-of-bounds reads in channel parsers
    34Monitor
  • ← EarlierCVE-2026-35512Apr 17, 2026 · xrdp: Heap buffer overflow in EGFX channel
    34Monitor
  • Later →CVE-2026-41521Jul 20, 2026 · xrdp: lib_framebuffer_update Has Integer Overflow Heap Info Leak & ASLR Bypass
    36Monitor

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
neutrinolabs xrdp0.10.6.1 · descriptionVendor (CNA)
debian:xrdp0.9.21.1-1+deb12u3 · Debian:12Package registry (OSV)
opensuse:xrdp0.10.6.1-1.1 · openSUSE:TumbleweedPackage registry (OSV)

Exploit status

No known public exploit

No public exploit has been observed yet. That doesn't mean you're safe, only that the bar is a little higher.

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

No dated events beyond publication.

EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

  • CVE-2026-441780 days apartxrdp: Channel Data Forwarding Fixed-Size Buffer Overflow
    35Monitor
  • CVE-2026-3551294 days apartxrdp: Heap buffer overflow in EGFX channel
    34Monitor
  • CVE-2026-3262394 days apartxrdp: Heap buffer overflow in NeutrinoRDP channel reassembly
    30Monitor
  • CVE-2026-3262494 days apartxrdp: Heap buffer overflow in xrdp_sec_process_logon_info() via incorrect g_strncat length calculation
    25Monitor

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • No special conditions are required; it is repeatable.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
high · the service can be disrupted
Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
High

Weakness class (CWE)

CWE-122 · Heap-based Buffer Overflow

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

nvd-secondary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Change log

  1. Fix✗ → ✓

For records you follow, these changes also arrive as notifications. →

References

Show all references (1 more)

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

All records