CVE-2026-55238

MEDIUMPre-NVD 5.35.3—
EchelonGraph scoreMEDIUM confidence

This medium-severity CVE scores 5.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.3%, top 77% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
5.3EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation for specific capability sets. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted RDP packet containing malformed capability data. Due to missing bounds checks, the xrdp process may perform out-of-bounds memory reads, which can result in the termination of the service (Denial of Service). However, since xrdp forks a new process for each connection by default, an out-of-bounds read causing a process crash is unlikely to bring down the entire xrdp service. This issue has been fixed in version 0.10.6.1.

CVSS v3
5.3
EG Score
5.3(medium)
EG Risk
39(Track)
EG Risk 39/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity53% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
23%
KEV
Not listed

Published

July 20, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jul 20, 2026
Patch available. Sources: github_release, github.
github Patch Available

Improper Input Validation in xrdp Capability Negotiation Leading to Denial of Service · Advisory · neutrinolabs/xrdp · GitHub

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-mg8j-x9rw-9xv3
github_release Patch Available

xrdp v0.10.6.1

Patch available: neutrinolabs/xrdp v0.10.6.1

https://github.com/neutrinolabs/xrdp/releases/tag/v0.10.6.1

Affected Packages

(4 across 4 ecosystems)
Debian:11(1)
PackageVulnerable rangeFixed inDependents
xrdp0.10.0-1 ... 0.9.24-5~bpo12+1 (43 versions)——
Debian:12(1)
PackageVulnerable rangeFixed inDependents
xrdp0.9.21.1-1, 0.9.21.1-1+deb12u1, 0.9.21.1-1+deb12u20.9.21.1-1+deb12u3—
Debian:13(1)
PackageVulnerable rangeFixed inDependents
xrdp0.10.1-3.1, 0.10.1-3.1+deb13u10.10.1-3.1+deb13u2—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
xrdp0.10.1-3.1 ... 0.10.6.1-1 (18 versions)0.10.6.1-2—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 10× in last 7d / 45× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-11 14:53 UTCEPSS rescore
  2. 2026-09-11 09:23 UTCEG score recompute
  3. 2026-09-10 09:35 UTCEPSS rescore
  4. 2026-09-09 11:52 UTCEG score recompute
  5. 2026-09-08 22:01 UTCEPSS rescore
  6. 2026-09-07 22:52 UTCEG score recompute
  7. 2026-09-07 16:01 UTCEPSS rescore
  8. 2026-09-06 13:47 UTCEPSS rescore
  9. 2026-09-06 11:43 UTCEG score recompute
  10. 2026-09-05 09:28 UTCEG score recompute
  11. 2026-09-04 05:06 UTCEPSS rescore
  12. 2026-09-02 14:12 UTCEPSS rescore
  13. 2026-09-01 13:54 UTCEPSS rescore
  14. 2026-09-01 04:40 UTCEPSS rescore
  15. 2026-08-31 03:49 UTCEG score recompute
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 02:34 UTCEG score recompute
  18. 2026-08-30 01:22 UTCEPSS rescore
  19. 2026-08-28 21:41 UTCEPSS rescore
  20. 2026-08-27 14:25 UTCEPSS rescore
  21. 2026-08-27 11:40 UTCEG score recompute
  22. 2026-08-26 14:46 UTCEPSS rescore
  23. 2026-08-26 07:20 UTCEG score recompute
  24. 2026-08-25 13:49 UTCEPSS rescore
  25. 2026-08-25 05:09 UTCEG score recompute
Show 63 more
  1. 2026-08-23 02:38 UTCEG score recompute
  2. 2026-08-23 00:19 UTCEPSS rescore
  3. 2026-08-22 01:23 UTCEG score recompute
  4. 2026-08-21 23:49 UTCEPSS rescore
  5. 2026-08-21 00:07 UTCEG score recompute
  6. 2026-08-20 22:55 UTCEPSS rescore
  7. 2026-08-19 22:49 UTCEG score recompute
  8. 2026-08-19 17:04 UTCEPSS rescore
  9. 2026-08-18 19:35 UTCEG score recompute
  10. 2026-08-18 13:48 UTCEPSS rescore
  11. 2026-08-17 13:47 UTCEPSS rescore
  12. 2026-08-17 13:14 UTCEG score recompute
  13. 2026-08-16 14:56 UTCEPSS rescore
  14. 2026-08-16 11:59 UTCEG score recompute
  15. 2026-08-16 02:14 UTCEPSS rescore
  16. 2026-08-15 10:45 UTCEG score recompute
  17. 2026-08-15 01:30 UTCEPSS rescore
  18. 2026-08-14 09:29 UTCEG score recompute
  19. 2026-08-13 22:00 UTCEPSS rescore
  20. 2026-08-13 08:14 UTCEG score recompute
  21. 2026-08-12 13:51 UTCEPSS rescore
  22. 2026-08-12 06:59 UTCEG score recompute
  23. 2026-08-11 05:43 UTCEG score recompute
  24. 2026-08-11 00:00 UTCEPSS rescore
  25. 2026-08-10 04:28 UTCEG score recompute
  26. 2026-08-09 13:46 UTCEPSS rescore
  27. 2026-08-09 03:13 UTCEG score recompute
  28. 2026-08-08 16:37 UTCEPSS rescore
  29. 2026-08-08 01:58 UTCEG score recompute
  30. 2026-08-07 00:43 UTCEG score recompute
  31. 2026-08-06 13:47 UTCEPSS rescore
  32. 2026-08-05 23:28 UTCEG score recompute
  33. 2026-08-05 19:17 UTCEPSS rescore
  34. 2026-08-04 22:13 UTCEG score recompute
  35. 2026-08-04 15:10 UTCEPSS rescore
  36. 2026-08-04 10:39 UTCEPSS rescore
  37. 2026-08-03 20:58 UTCEG score recompute
  38. 2026-08-03 10:36 UTCEPSS rescore
  39. 2026-08-02 19:43 UTCEG score recompute
  40. 2026-08-02 02:27 UTCEPSS rescore
  41. 2026-08-01 18:28 UTCEG score recompute
  42. 2026-08-01 04:16 UTCEPSS rescore
  43. 2026-07-31 17:13 UTCEG score recompute
  44. 2026-07-30 16:28 UTCEPSS rescore
  45. 2026-07-30 15:58 UTCEG score recompute
  46. 2026-07-29 14:33 UTCEG score recompute
  47. 2026-07-28 15:37 UTCEPSS rescore
  48. 2026-07-28 13:18 UTCEG score recompute
  49. 2026-07-27 12:02 UTCEG score recompute
  50. 2026-07-26 14:54 UTCEPSS rescore
  51. 2026-07-26 10:46 UTCEG score recompute
  52. 2026-07-25 14:18 UTCEPSS rescore
  53. 2026-07-24 14:18 UTCEPSS rescore
  54. 2026-07-23 14:18 UTCEPSS rescore
  55. 2026-07-23 03:20 UTCEG score recompute
  56. 2026-07-22 23:34 UTCEG score recompute
  57. 2026-07-22 14:08 UTCEPSS rescore
  58. 2026-07-21 15:25 UTCEPSS rescore
  59. 2026-07-20 20:44 UTCEG score recompute
  60. 2026-07-20 19:14 UTCEG score recompute
  61. 2026-07-20 18:41 UTCEG score recompute
  62. 2026-07-20 17:10 UTCEG score recompute
  63. 2026-07-20 17:09 UTCMITRE cvelistV5first tracked

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-55238?
CVE-2026-55238 is a medium vulnerability published on July 20, 2026. xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of RDP Confirm Active PDU, where during the capability negotiation phase, the parser did not perform sufficient length validation for specific capability sets. A remote, unauthenticated…
When was CVE-2026-55238 disclosed?
CVE-2026-55238 was first published in the National Vulnerability Database on July 20, 2026, with the most recent update on July 22, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-55238 actively exploited?
CVE-2026-55238 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 77.0% of all scored CVEs.
What is the CVSS score of CVE-2026-55238?
CVE-2026-55238 has a CVSS v3 base score of 5.3 (NVD).
How do I remediate CVE-2026-55238?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-55238, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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