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. This vulnerability is corrected in BarTender 12.1. Users of affected releases should upgrade to BarTender 12.1 or later.

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
57%
KEV
Not listed

Published

June 4, 2026

Last Modified

September 2, 2026

Advisory Details (3)

Auto-updated Sep 9, 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
generic

Seagull Trust Center | Powered by SafeBase

https://trust.seagullsoftware.com/?tcuUid=55ed135f-683c-4e9b-a59d-7d4373c0ac7e
generic

Seagull BarTender - CVE-2026-25550 / CVE-2026-25551 · GitHub

https://gist.github.com/VAMorales/dde5b1c0415a8505ccd6fafdb095a618

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 8× in last 7d / 53× 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 431 total refreshes for this CVE.

  1. 2026-09-16 05:15 UTCEPSS rescore
  2. 2026-09-14 09:07 UTCGHSA enrichment
  3. 2026-09-14 05:23 UTCEG score recompute
  4. 2026-09-14 05:23 UTCGHSA enrichment
  5. 2026-09-13 16:47 UTCEPSS rescore
  6. 2026-09-12 15:01 UTCEPSS rescore
  7. 2026-09-11 14:52 UTCEPSS rescore
  8. 2026-09-10 09:34 UTCEPSS rescore
  9. 2026-09-08 22:00 UTCEPSS rescore
  10. 2026-09-07 16:01 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-06 13:47 UTCEPSS rescore
  13. 2026-09-04 05:06 UTCEPSS rescore
  14. 2026-09-02 17:52 UTCEG score recompute
  15. 2026-09-02 17:52 UTCGHSA enrichment
  16. 2026-09-02 16:43 UTCEG score recompute
  17. 2026-09-02 16:42 UTCGHSA enrichment
  18. 2026-09-02 14:11 UTCEPSS rescore
  19. 2026-09-01 13:53 UTCEPSS rescore
  20. 2026-09-01 04:39 UTCEPSS rescore
  21. 2026-08-30 19:17 UTCEPSS rescore
  22. 2026-08-30 01:22 UTCEPSS rescore
  23. 2026-08-28 21:41 UTCEPSS rescore
  24. 2026-08-27 14:25 UTCEPSS rescore
  25. 2026-08-26 14:46 UTCEPSS rescore
Show 75 more
  1. 2026-08-25 13:48 UTCEPSS rescore
  2. 2026-08-25 03:28 UTCEG score recompute
  3. 2026-08-25 03:28 UTCGHSA enrichment
  4. 2026-08-23 23:55 UTCGHSA enrichment
  5. 2026-08-23 20:11 UTCGHSA enrichment
  6. 2026-08-23 16:26 UTCGHSA enrichment
  7. 2026-08-23 12:41 UTCEG score recompute
  8. 2026-08-23 12:41 UTCGHSA enrichment
  9. 2026-08-23 00:19 UTCEPSS rescore
  10. 2026-08-21 23:55 UTCEG score recompute
  11. 2026-08-21 23:55 UTCGHSA enrichment
  12. 2026-08-21 23:49 UTCEPSS rescore
  13. 2026-08-21 20:10 UTCGHSA enrichment
  14. 2026-08-21 14:36 UTCGHSA enrichment
  15. 2026-08-21 07:29 UTCGHSA enrichment
  16. 2026-08-21 01:05 UTCEG score recompute
  17. 2026-08-21 01:05 UTCGHSA enrichment
  18. 2026-08-20 22:55 UTCEPSS rescore
  19. 2026-08-20 21:19 UTCGHSA enrichment
  20. 2026-08-20 17:29 UTCGHSA enrichment
  21. 2026-08-20 09:56 UTCEG score recompute
  22. 2026-08-20 09:56 UTCGHSA enrichment
  23. 2026-08-19 17:03 UTCEPSS rescore
  24. 2026-08-18 13:48 UTCEPSS rescore
  25. 2026-08-17 14:39 UTCEG score recompute
  26. 2026-08-17 14:39 UTCGHSA enrichment
  27. 2026-08-17 13:47 UTCEPSS rescore
  28. 2026-08-17 10:53 UTCGHSA enrichment
  29. 2026-08-17 07:08 UTCGHSA enrichment
  30. 2026-08-17 03:23 UTCEG score recompute
  31. 2026-08-17 03:23 UTCGHSA enrichment
  32. 2026-08-16 14:56 UTCEPSS rescore
  33. 2026-08-16 14:54 UTCGHSA enrichment
  34. 2026-08-16 09:43 UTCGHSA enrichment
  35. 2026-08-16 05:59 UTCGHSA enrichment
  36. 2026-08-16 02:14 UTCEG score recompute
  37. 2026-08-16 02:14 UTCGHSA enrichment
  38. 2026-08-16 02:14 UTCEPSS rescore
  39. 2026-08-15 18:32 UTCGHSA enrichment
  40. 2026-08-15 14:23 UTCEG score recompute
  41. 2026-08-15 14:23 UTCGHSA enrichment
  42. 2026-08-15 01:30 UTCEPSS rescore
  43. 2026-08-15 01:26 UTCGHSA enrichment
  44. 2026-08-14 21:42 UTCGHSA enrichment
  45. 2026-08-14 17:57 UTCGHSA enrichment
  46. 2026-08-14 13:37 UTCGHSA enrichment
  47. 2026-08-14 09:53 UTCGHSA enrichment
  48. 2026-08-14 06:08 UTCGHSA enrichment
  49. 2026-08-14 02:23 UTCGHSA enrichment
  50. 2026-08-13 22:39 UTCEG score recompute
  51. 2026-08-13 22:39 UTCGHSA enrichment
  52. 2026-08-13 22:00 UTCEPSS rescore
  53. 2026-08-13 08:01 UTCGHSA enrichment
  54. 2026-08-13 04:16 UTCGHSA enrichment
  55. 2026-08-13 00:32 UTCGHSA enrichment
  56. 2026-08-12 20:47 UTCGHSA enrichment
  57. 2026-08-12 17:03 UTCEG score recompute
  58. 2026-08-12 17:03 UTCGHSA enrichment
  59. 2026-08-12 13:50 UTCEPSS rescore
  60. 2026-08-12 13:17 UTCGHSA enrichment
  61. 2026-08-12 08:29 UTCGHSA enrichment
  62. 2026-08-12 04:14 UTCGHSA enrichment
  63. 2026-08-12 00:29 UTCGHSA enrichment
  64. 2026-08-11 20:45 UTCGHSA enrichment
  65. 2026-08-11 17:00 UTCEG score recompute
  66. 2026-08-11 17:00 UTCGHSA enrichment
  67. 2026-08-11 13:42 UTCEPSS rescore
  68. 2026-08-11 13:15 UTCGHSA enrichment
  69. 2026-08-11 09:30 UTCGHSA enrichment
  70. 2026-08-11 05:44 UTCGHSA enrichment
  71. 2026-08-11 02:00 UTCEG score recompute
  72. 2026-08-11 01:59 UTCGHSA enrichment
  73. 2026-08-11 00:00 UTCEPSS rescore
  74. 2026-08-10 22:15 UTCGHSA enrichment
  75. 2026-08-10 14:52 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 September 2, 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 42.8% 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.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-25550

Explore →

Is Your Infrastructure Affected by CVE-2026-25550?

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

Start Free Scan →Browse All CVEs