CVE-2026-44403

HIGHPre-NVD 7.27.2
EchelonGraph scoreMEDIUM confidence

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

Score 7.2 from GitHub Security Advisory (severity: HIGH) published 2026-05-12. The CNA's CVSS baseline 7.2; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Elevated
7.2EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • Public exploit or proof-of-concept code is available
CISA-KEV: Not listedEPSS PROB: 2.3%CVSS: 7.2Exploit: Public PoCExposed 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 Wing FTP Server versions 8.1.3 as unaffected. No release containing a fix is confirmed on record.

Wing FTP Server before 8.1.3 contains an authenticated remote code execution vulnerability in the session serialization mechanism that allows authenticated administrators to inject arbitrary Lua code through the domain admin mydirectory field. Attackers can exploit unsafe serialization of session values into Lua source code without proper escaping of closing delimiters, causing the injected code to be executed when the poisoned session is loaded via loadfile().

CVSS v3
7.2
EG Score
7.2HIGHmedium confidence
EG Risk
48
EG Risk 48/100

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)
Severity72% × 45%
The EG Score, 7.2 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
2.3%
EPSS %ILE
82nd
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* 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, and watch the vendor's advisory for the fix.

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

May 12, 2026

Last Modified

July 14, 2026

Advisory Details (2)

Auto-updated Jun 11, 2026
No fix on record yet.
Web page

Wing FTP Server History

https://www.wftpserver.com/serverhistory.htm
Web page

Wing FTP Server < 8.1.3 Authenticated Remote Code Execution via Session Serialization | Advisories | VulnCheck

https://www.vulncheck.com/advisories/wing-ftp-server-authenticated-remote-code-execution-via-session-serialization

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 26× 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 224 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 124 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-16 16:42 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  2. 2026-10-15 16:32 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  3. 2026-10-14 16:33 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  5. 2026-10-12 16:34 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  6. 2026-10-12 16:05 UTCEG score recompute
  7. 2026-10-11 19:47 UTCEG score recompute
  8. 2026-10-11 17:01 UTCEG score recompute
  9. 2026-10-11 14:27 UTCEG score recompute
  10. 2026-10-11 13:48 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  11. 2026-10-10 20:00 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  12. 2026-10-09 20:07 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  13. 2026-10-08 17:12 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  14. 2026-10-07 23:48 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  15. 2026-10-06 15:18 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  16. 2026-10-05 17:43 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  17. 2026-10-04 23:22 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  18. 2026-10-03 14:25 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  20. 2026-09-30 15:03 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  21. 2026-09-27 13:48 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  22. 2026-09-26 15:58 UTCEPSS rescoreEPSS 2.3% · 82nd percentile
  23. 2026-09-23 17:53 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 2.6% · 84th percentile
Show 75 more
  1. 2026-09-17 19:31 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  2. 2026-09-16 14:08 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  3. 2026-09-16 05:15 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  4. 2026-09-12 15:01 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  5. 2026-09-11 14:53 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  6. 2026-09-11 09:37 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  7. 2026-09-10 09:34 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  8. 2026-09-08 22:00 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  9. 2026-09-07 16:01 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  10. 2026-09-06 13:47 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  11. 2026-09-04 05:06 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  12. 2026-09-02 14:12 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  13. 2026-09-01 13:54 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  14. 2026-08-30 19:17 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  15. 2026-08-30 01:22 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  16. 2026-08-28 21:41 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  17. 2026-08-27 14:25 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  18. 2026-08-26 14:46 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  19. 2026-08-25 13:49 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  20. 2026-08-23 18:06 UTCEG score recompute
  21. 2026-08-23 18:06 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  22. 2026-08-23 00:19 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  23. 2026-08-21 23:49 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  24. 2026-08-20 22:55 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  25. 2026-08-20 21:36 UTCEG score recompute
  26. 2026-08-20 21:36 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  27. 2026-08-19 17:04 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  28. 2026-08-18 13:48 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  29. 2026-08-17 13:47 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  30. 2026-08-17 10:46 UTCEG score recompute
  31. 2026-08-17 10:46 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  32. 2026-08-16 14:56 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  33. 2026-08-16 04:10 UTCEG score recompute
  34. 2026-08-16 04:10 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  35. 2026-08-16 02:14 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  36. 2026-08-15 01:30 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  37. 2026-08-14 15:10 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  38. 2026-08-14 02:39 UTCEG score recompute
  39. 2026-08-14 02:39 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  40. 2026-08-13 22:00 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  41. 2026-08-13 04:27 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  42. 2026-08-12 15:56 UTCEG score recompute
  43. 2026-08-12 15:56 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  44. 2026-08-12 13:51 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  45. 2026-08-11 15:38 UTCEG score recompute
  46. 2026-08-11 15:38 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  47. 2026-08-11 13:43 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  48. 2026-08-11 01:01 UTCEG score recompute
  49. 2026-08-11 01:01 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  50. 2026-08-11 00:00 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  51. 2026-08-10 03:02 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  52. 2026-08-09 14:32 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  53. 2026-08-09 02:00 UTCEG score recompute
  54. 2026-08-09 02:00 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  55. 2026-08-08 16:37 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  56. 2026-08-08 02:28 UTCEG score recompute
  57. 2026-08-08 02:28 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  58. 2026-08-07 13:57 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  59. 2026-08-07 01:26 UTCEG score recompute
  60. 2026-08-07 01:26 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  61. 2026-08-06 13:46 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  62. 2026-08-06 10:17 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  63. 2026-08-05 21:45 UTCEG score recompute
  64. 2026-08-05 21:45 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  65. 2026-08-05 19:17 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  66. 2026-08-04 15:10 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  67. 2026-08-04 10:38 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  68. 2026-08-03 19:12 UTCEG score recompute
  69. 2026-08-03 19:12 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  70. 2026-08-03 10:36 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  71. 2026-08-02 23:28 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  72. 2026-08-02 10:56 UTCEG score recompute
  73. 2026-08-02 10:56 UTCGHSA enrichmentGHSA-ffh5-r5xj-cgmg · GitHub severity HIGH · GitHub CVSS 7.2
  74. 2026-08-02 02:27 UTCEPSS rescoreEPSS 2.6% · 84th percentile
  75. 2026-08-01 22:25 UTCEG score recompute

Publicly available exploits

(1 reference)

Public exploit code is referenced for this CVE (1 Exploit-DB entry). No fix is confirmed yet, so defenders should restrict or isolate affected systems accordingly until one is published.

  • Exploit-DBEDB-52589
    Published May 29, 2026

    Wing FTP Server 8.1.3 - Authenticated Remote Code Execution

    Open source ↗

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-44403?
CVE-2026-44403 is a high-severity vulnerability; its CVE record was published on May 12, 2026. Wing FTP Server before 8.1.3 contains an authenticated remote code execution vulnerability in the session serialization mechanism that allows authenticated administrators to inject arbitrary Lua code through the domain admin mydirectory field. Attackers can exploit unsafe serialization of session…
When was CVE-2026-44403 made public?
CVE-2026-44403 was made public on May 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 May 12, 2026. EchelonGraph's copy of the record carries a last-modified date of July 14, 2026; the record at its source may have been updated since.
Is CVE-2026-44403 actively exploited?
CVE-2026-44403 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.3% probability of exploitation in the next 30 days (82nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-44403?
CVE-2026-44403 has a CVSS base score of 7.2 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-44403?
No fix for CVE-2026-44403 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 Wing FTP Server versions 8.1.3 as unaffected. No release containing a fix is confirmed on record.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-44403

Explore →

Is Your Infrastructure Affected by CVE-2026-44403?

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

Book a Demo →Browse All CVEs