CVE-2026-40139

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

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

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-06. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.8%CVSS: 9.8Exploit: None knownExposed 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 (BeyondTrust Inc.) lists BeyondTrust Remote Support versions up to and including 25.3.2; BeyondTrust Privileged Remote Access versions up to and including 25.3.2 as affected. No release containing a fix is confirmed on record.

A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support. Improper processing of authentication requests may allow an unauthenticated remote attacker to bypass access controls and gain unauthorized access to the appliance, including accounts with elevated privileges. Exploitation requires a specific authentication configuration to be enabled.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

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)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation0.8% × 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: 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
0.8%
EPSS %ILE
53rd
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

July 6, 2026

Last Modified

July 7, 2026

References (1)

Vendor Advisories for CVE-2026-40139(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 17× in last 7d / 38× 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 99 of 419 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. 1 repeat row among the latest 100 is merged into the row it repeats. The 320 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-14 16:32 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  2. 2026-10-14 02:13 UTCEG score recompute
  3. 2026-10-14 02:13 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  4. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  5. 2026-10-12 22:32 UTCEG score recompute
  6. 2026-10-12 22:32 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  7. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  8. 2026-10-12 16:09 UTCEG score recompute
  9. 2026-10-12 08:06 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-10-11 19:52 UTCEG score recompute
  11. 2026-10-11 17:05 UTCEG score recompute
  12. 2026-10-11 14:31 UTCEG score recompute
  13. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  14. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  15. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  16. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  17. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  18. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  19. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  20. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  21. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  22. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  23. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  24. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  25. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
Show 74 more
  1. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  2. 2026-09-23 10:10 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  3. 2026-09-23 06:24 UTCEG score recompute
  4. 2026-09-23 06:24 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  5. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  6. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  7. 2026-09-18 10:11 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  8. 2026-09-18 06:00 UTCEG score recompute
  9. 2026-09-18 06:00 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  10. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  11. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  12. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  13. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.8% · 53rd percentile
  14. 2026-09-14 11:40 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  15. 2026-09-14 07:27 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  16. 2026-09-14 03:42 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  17. 2026-09-13 23:56 UTCEG score recompute
  18. 2026-09-13 23:56 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  19. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  20. 2026-09-13 16:46 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  21. 2026-09-13 12:29 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  22. 2026-09-13 08:44 UTCEG score recompute
  23. 2026-09-13 08:44 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  24. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  25. 2026-09-12 13:37 UTCEG score recompute
  26. 2026-09-12 13:37 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  27. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  28. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  29. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  30. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  31. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  32. 2026-09-06 14:11 UTCEG score recompute
  33. 2026-09-06 14:11 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  34. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  35. 2026-09-06 02:59 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  36. 2026-09-05 23:12 UTCEG score recompute
  37. 2026-09-05 23:12 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  38. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  39. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  40. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  41. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  42. 2026-08-31 00:21 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  43. 2026-08-30 20:36 UTCEG score recompute
  44. 2026-08-30 20:36 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  45. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  46. 2026-08-30 16:50 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  47. 2026-08-30 13:04 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  48. 2026-08-30 08:15 UTCEG score recompute
  49. 2026-08-30 08:15 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  50. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  51. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  52. 2026-08-28 02:44 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  53. 2026-08-27 21:59 UTCEG score recompute
  54. 2026-08-27 21:59 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  55. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  56. 2026-08-27 02:16 UTCEG score recompute
  57. 2026-08-27 02:16 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  58. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  59. 2026-08-26 13:55 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  60. 2026-08-25 16:00 UTCEG score recompute
  61. 2026-08-25 16:00 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  62. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.8% · 52nd percentile
  63. 2026-08-25 12:02 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  64. 2026-08-25 04:27 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  65. 2026-08-25 00:42 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  66. 2026-08-24 20:48 UTCEG score recompute
  67. 2026-08-24 20:48 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  68. 2026-08-24 13:47 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  69. 2026-08-24 10:02 UTCEG score recompute
  70. 2026-08-24 10:02 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  71. 2026-08-24 04:06 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  72. 2026-08-24 00:09 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  73. 2026-08-23 20:22 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8
  74. 2026-08-23 16:37 UTCGHSA enrichmentGHSA-5wv8-v74x-qrjc · GitHub severity CRITICAL · GitHub CVSS 9.8

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Frequently asked(5)

What is CVE-2026-40139?
CVE-2026-40139 is a critical-severity vulnerability; its CVE record was published on July 6, 2026. A critical pre-authentication vulnerability exists in the authentication subsystem of BeyondTrust Remote Support. Improper processing of authentication requests may allow an unauthenticated remote attacker to bypass access controls and gain unauthorized access to the appliance, including accounts…
When was the CVE record for CVE-2026-40139 published?
The CVE record for CVE-2026-40139 was published on July 6, 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 July 7, 2026; the record at its source may have been updated since.
Is CVE-2026-40139 actively exploited?
CVE-2026-40139 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.8% probability of exploitation in the next 30 days (53rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40139?
CVE-2026-40139 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-40139?
No fix for CVE-2026-40139 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 (BeyondTrust Inc.) lists BeyondTrust Remote Support versions up to and including 25.3.2; BeyondTrust Privileged Remote Access versions up to and including 25.3.2 as affected. No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-40139 are linked in the Vendor Advisories panel on this page.

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