CVE-2026-66050

HIGHPre-NVD 7.57.5
EchelonGraph scoreMEDIUM confidence

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

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-07-27. A secondary CVSS source baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, a secondary CVSS source
Trending — 3 sources updated this weekElevated
7.5EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 1.1%CVSS: 7.5Exploit: No code on recordExposed services: Not assessed

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

The CVE record's CNA (VulnCheck) lists nitroshare-desktop versions up to and including 0.3.4 as affected. No release containing a fix is confirmed on record.

NitroShare Desktop through 0.3.4 contains a path traversal vulnerability in its LAN file transfer server that allows unauthenticated attackers on the same network to write arbitrary files by sending a crafted filename containing directory traversal sequences in the JSON item header name field. Attackers can exploit the lack of path validation to write files outside the transfer root directory to arbitrary locations the current user has write access, including the Windows Startup folder, enabling persistent code execution on the next user login.

CVSS v3
7.5
EG Score
7.5HIGHmedium confidence
EG Risk
65
EG Risk 65/100

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)
Severity75% × 45%
Impact severity (EG Severity): CVSS 7.5 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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 public PoC (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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.
EPSS PROB
1.1%
EPSS %ILE
65th
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 (7.5): severity, escalated by confirmed exploitation. This CVE's 7.5 is its impact severity (EG Severity), not escalated.

EG Severity
7.5 HIGHCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.GitHub Security Advisory CVSS
EG Likelihood
1.1% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-17). 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; Attend at high (mission-essential systems).CISA BOD 26-04: 14 days if the affected system is publicly exposed; 60 days 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; Attend at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines at low or medium mission impact and sooner than that at high, and watch the vendor's advisory for the fix.

Exploitation public PoC (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 27, 2026

Last Modified

July 28, 2026

Advisory Details (2)

Auto-updated Jul 27, 2026
No fix on record yet.
Web page

NitroShare Desktop 0.3.4 Path Traversal via LAN File Transfer Server | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nitroshare-desktop-path-traversal-via-lan-file-transfer-server
Web page

GitHub - cduram/NotCVE-2026-0009: Vulnerability in NitroShare Desktop v0.3.4 · GitHub

https://github.com/cduram/NotCVE-2026-0009

Vendor Advisories for CVE-2026-66050(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 52× 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 246 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 146 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-19 16:32 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  2. 2026-10-18 16:32 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  3. 2026-10-18 03:21 UTCEG score recompute
  4. 2026-10-17 16:35 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  5. 2026-10-16 16:43 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  6. 2026-10-15 16:32 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  8. 2026-10-13 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  9. 2026-10-13 11:01 UTCEG score recompute
  10. 2026-10-13 11:01 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  11. 2026-10-12 16:34 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  12. 2026-10-12 15:46 UTCEG score recompute
  13. 2026-10-11 19:31 UTCEG score recompute
  14. 2026-10-11 16:46 UTCEG score recompute
  15. 2026-10-11 14:07 UTCEG score recompute
  16. 2026-10-11 13:49 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  17. 2026-10-10 20:00 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  18. 2026-10-09 20:07 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  19. 2026-10-08 17:13 UTCEPSS rescoreEPSS 1.1% · 65th percentile
  20. 2026-10-07 23:48 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  21. 2026-10-07 02:31 UTCEG score recompute
  22. 2026-10-07 02:31 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-10-06 15:18 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  24. 2026-10-05 17:43 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  25. 2026-10-04 23:22 UTCEPSS rescoreEPSS 1.1% · 64th percentile
Show 75 more
  1. 2026-10-04 07:19 UTCEG score recompute
  2. 2026-10-04 07:19 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  3. 2026-10-03 14:26 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  4. 2026-10-02 18:28 UTCEG score recompute
  5. 2026-10-02 18:28 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  6. 2026-10-02 17:56 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  7. 2026-10-01 19:50 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  8. 2026-10-01 15:04 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  9. 2026-10-01 03:53 UTCEG score recompute
  10. 2026-10-01 03:53 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  11. 2026-09-30 15:03 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  12. 2026-09-29 07:53 UTCEG score recompute
  13. 2026-09-29 07:53 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  14. 2026-09-28 13:51 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  15. 2026-09-28 03:52 UTCEG score recompute
  16. 2026-09-28 03:52 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  17. 2026-09-26 15:59 UTCEPSS rescoreEPSS 1.1% · 64th percentile
  18. 2026-09-25 06:54 UTCEG score recompute
  19. 2026-09-25 06:54 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  20. 2026-09-24 09:12 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  21. 2026-09-23 22:02 UTCEG score recompute
  22. 2026-09-23 22:02 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  23. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  24. 2026-09-23 09:01 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  25. 2026-09-22 21:49 UTCEG score recompute
  26. 2026-09-22 21:49 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  27. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.7% · 53rd percentile
  28. 2026-09-20 00:56 UTCEG score recompute
  29. 2026-09-20 00:56 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  30. 2026-09-19 08:17 UTCEG score recompute
  31. 2026-09-19 08:17 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  32. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  33. 2026-09-18 18:54 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  34. 2026-09-18 02:24 UTCEG score recompute
  35. 2026-09-18 02:24 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  36. 2026-09-17 01:47 UTCEG score recompute
  37. 2026-09-17 01:47 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  38. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  39. 2026-09-16 06:17 UTCEG score recompute
  40. 2026-09-16 06:17 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  41. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  42. 2026-09-15 09:10 UTCEG score recompute
  43. 2026-09-15 09:10 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  44. 2026-09-14 15:42 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  45. 2026-09-14 03:19 UTCEG score recompute
  46. 2026-09-14 03:19 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  47. 2026-09-13 16:09 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  48. 2026-09-13 04:56 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  49. 2026-09-12 17:46 UTCEG score recompute
  50. 2026-09-12 17:46 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  51. 2026-09-12 06:36 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  52. 2026-09-11 19:24 UTCEG score recompute
  53. 2026-09-11 19:24 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  54. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  55. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  56. 2026-09-11 08:03 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  57. 2026-09-10 20:48 UTCEG score recompute
  58. 2026-09-10 20:48 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  59. 2026-09-10 08:16 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  60. 2026-09-09 08:21 UTCEG score recompute
  61. 2026-09-09 08:21 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  62. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  63. 2026-09-07 21:03 UTCEG score recompute
  64. 2026-09-07 21:03 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  65. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  66. 2026-09-06 18:54 UTCEG score recompute
  67. 2026-09-06 18:54 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  68. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.7% · 52nd percentile
  69. 2026-09-06 07:43 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  70. 2026-09-05 19:15 UTCEG score recompute
  71. 2026-09-05 19:15 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  72. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.7% · 51st percentile
  73. 2026-09-05 05:45 UTCEG score recompute
  74. 2026-09-05 05:45 UTCGHSA enrichmentGHSA-5xhx-w5wq-c68v · GitHub severity HIGH · GitHub CVSS 7.5
  75. 2026-09-04 12:32 UTCEG score recompute

Frequently asked(5)

What is CVE-2026-66050?
CVE-2026-66050 is a high-severity vulnerability; its CVE record was published on July 27, 2026. NitroShare Desktop through 0.3.4 contains a path traversal vulnerability in its LAN file transfer server that allows unauthenticated attackers on the same network to write arbitrary files by sending a crafted filename containing directory traversal sequences in the JSON item header name field.…
When was CVE-2026-66050 made public?
CVE-2026-66050 was made public on April 12, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 27, 2026. EchelonGraph's copy of the record carries a last-modified date of July 28, 2026; the record at its source may have been updated since.
Is CVE-2026-66050 actively exploited?
CVE-2026-66050 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1.1% probability of exploitation in the next 30 days (65th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-66050?
CVE-2026-66050 has a CVSS base score of 7.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-66050?
No fix for CVE-2026-66050 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's CNA (VulnCheck) lists nitroshare-desktop versions up to and including 0.3.4 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-66050 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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