CVE-2026-55645

MEDIUMPre-NVD 6.56.5
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This medium-severity CVE scores 6.5 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 0.5% (39th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
6.5EG
EchelonGraph verdictMonitorRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 6.5Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

xrdp is an open source RDP server. Versions 0.10.6 and prior contain a vulnerability concerning the processing of Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote, unauthenticated attacker could potentially exploit this flaw by sending a specially crafted, truncated Client Control PDU. 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
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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 (value × EchelonGraph’s weight)
Severity65% × 45%
The EG Score, 6.5 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Attend at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
0.5%
EPSS %ILE
39th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Attend at high (mission-essential systems).

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation none (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)14 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 20, 2026

Last Modified

July 22, 2026

Advisory Details (2)

Auto-updated Jul 20, 2026
Patch available. Sources: github_release, github.
GitHub advisoryMentions a patch (unverified)

Out-of-Bounds Read in xrdp Client Control PDU Processing · Advisory · neutrinolabs/xrdp · GitHub

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-3m4m-h22g-c7xx
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 rangeFix by version rangeDependents
xrdp0.10.0-1 ... 0.9.24-5~bpo12+1 (43 versions)
  • every version on: no fix on record
—
Debian:12(1)
PackageVulnerable rangeFix by version rangeDependents
xrdp0.9.21.1-1, 0.9.21.1-1+deb12u1, 0.9.21.1-1+deb12u2
  • every version up to 0.9.21.1-1+deb12u3: fixed in 0.9.21.1-1+deb12u3
—
Debian:13(1)
PackageVulnerable rangeFix by version rangeDependents
xrdp0.10.1-3.1, 0.10.1-3.1+deb13u1
  • every version up to 0.10.1-3.1+deb13u2: fixed in 0.10.1-3.1+deb13u2
—
Debian:14(1)
PackageVulnerable rangeFix by version rangeDependents
xrdp0.10.1-3.1 ... 0.10.6.1-2~bpo13+1 (19 versions)
  • every version up to 0.10.6.1-2: fixed in 0.10.6.1-2
—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 12× in last 7d / 38× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 129 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 29 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-10-12 15:55 UTCEG score recompute
  5. 2026-10-11 19:38 UTCEG score recompute
  6. 2026-10-11 16:54 UTCEG score recompute
  7. 2026-10-11 14:16 UTCEG score recompute
  8. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  13. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  16. 2026-10-04 14:56 UTCEG score recompute
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-10-01 07:42 UTCEG score recompute
  21. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  22. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  24. 2026-09-28 06:22 UTCEG score recompute
  25. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
Show 75 more
  1. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  2. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-09-24 03:28 UTCEG score recompute
  4. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  5. 2026-09-23 01:40 UTCEG score recompute
  6. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  7. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 21st percentile
  8. 2026-09-18 03:56 UTCEG score recompute
  9. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  10. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  11. 2026-09-16 12:47 UTCEG score recompute
  12. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  13. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  14. 2026-09-14 07:07 UTCEG score recompute
  15. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  16. 2026-09-13 08:33 UTCEG score recompute
  17. 2026-09-12 09:59 UTCEG score recompute
  18. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  19. 2026-09-11 09:23 UTCEG score recompute
  20. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  21. 2026-09-09 11:53 UTCEG score recompute
  22. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  23. 2026-09-07 22:53 UTCEG score recompute
  24. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  25. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  26. 2026-09-06 11:44 UTCEG score recompute
  27. 2026-09-05 09:29 UTCEG score recompute
  28. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  29. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  30. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  31. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  32. 2026-08-31 01:09 UTCEG score recompute
  33. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  34. 2026-08-30 02:33 UTCEG score recompute
  35. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  36. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  37. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  38. 2026-08-27 12:16 UTCEG score recompute
  39. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  40. 2026-08-25 14:31 UTCEG score recompute
  41. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  42. 2026-08-24 15:52 UTCEG score recompute
  43. 2026-08-23 17:16 UTCEG score recompute
  44. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  45. 2026-08-22 18:42 UTCEG score recompute
  46. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  47. 2026-08-21 20:07 UTCEG score recompute
  48. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  49. 2026-08-19 22:59 UTCEG score recompute
  50. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  51. 2026-08-19 00:25 UTCEG score recompute
  52. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  53. 2026-08-18 01:48 UTCEG score recompute
  54. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  55. 2026-08-17 02:32 UTCEG score recompute
  56. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  57. 2026-08-16 03:58 UTCEG score recompute
  58. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  59. 2026-08-15 05:24 UTCEG score recompute
  60. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  61. 2026-08-14 06:49 UTCEG score recompute
  62. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  63. 2026-08-13 08:15 UTCEG score recompute
  64. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  65. 2026-08-12 09:41 UTCEG score recompute
  66. 2026-08-11 11:06 UTCEG score recompute
  67. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  68. 2026-08-09 13:58 UTCEG score recompute
  69. 2026-08-09 13:46 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  70. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  71. 2026-08-07 16:49 UTCEG score recompute
  72. 2026-08-06 18:15 UTCEG score recompute
  73. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.3% · 20th percentile
  74. 2026-08-05 19:40 UTCEG score recompute
  75. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 20th percentile

Related CVEs(same product + same CWE)

Frequently asked(5)

What is CVE-2026-55645?
CVE-2026-55645 is a medium-severity vulnerability; its CVE record was 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 Client Control PDUs. During the RDP connection sequence, the parser does not perform sufficient length validation before reading specific data fields from the network stream. A remote,…
When was the CVE record for CVE-2026-55645 published?
The CVE record for CVE-2026-55645 was published on July 20, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 22, 2026; the record at its source may have been updated since.
Is CVE-2026-55645 actively exploited?
CVE-2026-55645 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (39th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55645?
CVE-2026-55645 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-55645?
A fix for CVE-2026-55645 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-55645

Explore →

Is Your Infrastructure Affected by CVE-2026-55645?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.

Book a Demo →Browse All CVEs