CVE-2026-25550

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-06-04. a secondary CVSS source baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

Seagull Software BarTender 2010, 2016, and 2019 contain an unauthenticated remote code execution vulnerability in the .NET Remoting service exposed on TCP port 7375 via BtSystem.Service.exe. The service registers an unauthenticated singleton endpoint — BarTenderSystem for BarTender 2016 <= R9, and DataServiceSingleton for BarTender 2019 <= R10 — configured with BinaryServerFormatterSinkProvider and TypeFilterLevel set to Full. An unauthenticated remote attacker can exploit .NET Remoting object unmarshalling to read or write arbitrary files on the server using the .NET WebClient class, or coerce NTLMv2 authentication by supplying a UNC path to an attacker-controlled server, enabling sensitive credential disclosure, remote code execution, or lateral movement depending on service account privileges and network environment. The service runs in the context of NT AUTHORITY\SYSTEM.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
59(Track)
EG Risk 59/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
50%
KEV
Not listed

Published

June 4, 2026

Last Modified

July 22, 2026

Advisory Details (1)

Auto-updated Jul 25, 2026
No patch confirmed yet.
generic

Seagull Software BarTender Unauthenticated RCE via .NET Remoting Service | Advisories | VulnCheck

https://www.vulncheck.com/advisories/seagull-software-bartender-unauthenticated-rce-via-net-remoting-service

Vendor Advisories for CVE-2026-25550(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 15× in last 7d / 102× 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.

Showing the most recent 100 of 252 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-25550?
CVE-2026-25550 is a critical vulnerability published on June 4, 2026. Seagull Software BarTender 2010, 2016, and 2019 contain an unauthenticated remote code execution vulnerability in the .NET Remoting service exposed on TCP port 7375 via BtSystem.Service.exe. The service registers an unauthenticated singleton endpoint — BarTenderSystem for BarTender 2016 <= R9, and…
When was CVE-2026-25550 disclosed?
CVE-2026-25550 was first published in the National Vulnerability Database on June 4, 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-2026-25550 actively exploited?
CVE-2026-25550 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 49.6% of all scored CVEs.
What is the CVSS score of CVE-2026-25550?
CVE-2026-25550 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-25550?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-25550, 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.

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