CVE-2026-55626

HIGHNVD 7.37.3
EchelonGraph scoreMEDIUM confidence

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

This high-severity CVE scores 7.3 under NVD CVSS v3. EPSS exploit probability: 0.2% (8th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from NVD CVSS v3
Sources: EPSS, NVD CVSS v3

Also known asEUVD-2026-46041 (ENISA EUVD)Source: ENISA EUVD

7.3EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.2%CVSS: 7.3Exploit: None knownExposed services: Not assessed

A fix is available — apply it.

xrdp is an open source RDP server. In versions 0.10.6 and prior, when an authenticated user session is initialized using the Xvnc backend over UNIX domain sockets, the Xvnc process is launched with insufficient authentication mechanisms. A local authenticated attacker could exploit this vulnerability to bypass intended session isolation, allowing them to unauthorizedly view or control the active desktop sessions of other users on the same system. Users using other backends, such as xorgxrdp or Xvnc over TCP sockets, are not affected. This issue has been fixed in version 0.10.6.1.

CVSS v3
7.3
EG Score
7.3HIGHmedium confidence
EG Risk
33
EG Risk 33/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity73% × 45%
Impact severity (EG Severity): CVSS 7.3 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation0.2% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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.
EPSS PROB
0.2%
EPSS %ILE
8th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (7.3): severity, escalated by confirmed exploitation. This CVE's 7.3 is its impact severity (EG Severity), not escalated.

EG Severity
7.3 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.NVD CVSS v3 · CVSS v3.0 or v3.1
EG Likelihood
0.2% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-24). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track at medium mission impactTrack at low or medium mission impact; Track* at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; Fix on system upgrade if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

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

A fix is available. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (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; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact total (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

October 24, 2026

Advisory Details (2)

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

Missing authentication when xrdp launches Xvnc in UNIX domain socket mode · Advisory · neutrinolabs/xrdp · GitHub

https://github.com/neutrinolabs/xrdp/security/advisories/GHSA-m3xx-cpc4-982r
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

(1 across 1 ecosystem)
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(2)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 42× 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 147 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 47 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-27 16:32 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  2. 2026-10-26 16:31 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  3. 2026-10-25 16:33 UTCEPSS rescoreEPSS 0.2% · 8th percentile
  4. 2026-10-25 14:18 UTCEG score recompute
  5. 2026-10-24 20:27 UTCEG score recompute
  6. 2026-10-24 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-10-24 06:25 UTCEG score recompute
  8. 2026-10-23 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-22 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  10. 2026-10-21 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-20 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-19 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-18 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  14. 2026-10-18 03:30 UTCEG score recompute
  15. 2026-10-17 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-10-17 03:16 UTCEG score recompute
  17. 2026-10-16 16:42 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  18. 2026-10-15 16:32 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-10-14 16:33 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  22. 2026-10-12 15:55 UTCEG score recompute
  23. 2026-10-11 19:38 UTCEG score recompute
  24. 2026-10-11 16:54 UTCEG score recompute
  25. 2026-10-11 14:16 UTCEG score recompute
Show 75 more
  1. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  2. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  3. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  4. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  5. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  6. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  7. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  8. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  9. 2026-10-04 14:55 UTCEG score recompute
  10. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  11. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  12. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  13. 2026-10-01 07:42 UTCEG score recompute
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  15. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  16. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  17. 2026-09-28 06:21 UTCEG score recompute
  18. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  19. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  20. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.2% · 7th percentile
  21. 2026-09-24 03:28 UTCEG score recompute
  22. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  23. 2026-09-23 01:39 UTCEG score recompute
  24. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  26. 2026-09-18 03:55 UTCEG score recompute
  27. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  28. 2026-09-17 05:10 UTCEG score recompute
  29. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  30. 2026-09-16 12:47 UTCEG score recompute
  31. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  32. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  33. 2026-09-11 20:31 UTCEG score recompute
  34. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  35. 2026-09-11 09:23 UTCEG score recompute
  36. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  37. 2026-09-09 11:52 UTCEG score recompute
  38. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  39. 2026-09-07 22:52 UTCEG score recompute
  40. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  41. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  42. 2026-09-05 20:20 UTCEG score recompute
  43. 2026-09-05 09:28 UTCEG score recompute
  44. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  45. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  46. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  47. 2026-08-31 00:23 UTCEG score recompute
  48. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  49. 2026-08-30 02:33 UTCEG score recompute
  50. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  51. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  52. 2026-08-27 22:30 UTCEG score recompute
  53. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  54. 2026-08-25 20:13 UTCEG score recompute
  55. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  56. 2026-08-24 22:11 UTCEG score recompute
  57. 2026-08-24 11:17 UTCEG score recompute
  58. 2026-08-23 02:46 UTCEG score recompute
  59. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  60. 2026-08-22 04:58 UTCEG score recompute
  61. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  62. 2026-08-21 07:18 UTCEG score recompute
  63. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  64. 2026-08-19 22:48 UTCEG score recompute
  65. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  66. 2026-08-17 15:28 UTCEG score recompute
  67. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  68. 2026-08-16 17:48 UTCEG score recompute
  69. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  70. 2026-08-16 06:44 UTCEG score recompute
  71. 2026-08-16 02:14 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  72. 2026-08-15 09:05 UTCEG score recompute
  73. 2026-08-15 01:30 UTCEPSS rescoreEPSS 0.1% · 2nd percentile
  74. 2026-08-14 00:35 UTCEG score recompute
  75. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.1% · 2nd percentile

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Frequently asked(5)

What is CVE-2026-55626?
CVE-2026-55626 is a high-severity vulnerability; its CVE record was published on July 20, 2026. xrdp is an open source RDP server. In versions 0.10.6 and prior, when an authenticated user session is initialized using the Xvnc backend over UNIX domain sockets, the Xvnc process is launched with insufficient authentication mechanisms. A local authenticated attacker could exploit this…
When was the CVE record for CVE-2026-55626 published?
The CVE record for CVE-2026-55626 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 October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-55626 actively exploited?
CVE-2026-55626 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.2% probability of exploitation in the next 30 days (8th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-55626?
CVE-2026-55626 has a CVSS v3 base score of 7.3 (NVD).
How do I remediate CVE-2026-55626?
A fix for CVE-2026-55626 is available: update to the fixed version the vendor names in its advisory.

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