CVE-2026-40138

HIGHNVD 8.18.1
EchelonGraph scoreMEDIUM confidence

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

Score 8.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-06. NVD baseline CVSS 8.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
8.1EG
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: 0.5%CVSS: 8.1Exploit: 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 and Privileged Remote Access. Improper validation of authentication data may allow a network-positioned 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
8.1
EG Score
8.1HIGHmedium confidence
EG Risk
37
EG Risk 37/100

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)
Severity81% × 45%
The EG Score, 8.1 of 10.
Exploitation0.5% × 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
0.5%
EPSS %ILE
38th
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-2026-40138(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 12× in last 7d / 31× 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 235 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 136 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 0.5% · 38th percentile
  2. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  3. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  4. 2026-10-12 16:09 UTCEG score recompute
  5. 2026-10-11 19:52 UTCEG score recompute
  6. 2026-10-11 17:05 UTCEG score recompute
  7. 2026-10-11 14:31 UTCEG score recompute
  8. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  9. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  10. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  11. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  12. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  13. 2026-10-06 15:17 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  14. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  15. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  16. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  17. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  18. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  20. 2026-09-26 15:58 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  21. 2026-09-26 00:26 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  22. 2026-09-23 06:24 UTCEG score recompute
  23. 2026-09-23 06:24 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  24. 2026-09-20 20:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
Show 74 more
  1. 2026-09-18 06:00 UTCEG score recompute
  2. 2026-09-18 06:00 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  3. 2026-09-17 19:30 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  4. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  5. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  6. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  7. 2026-09-13 23:56 UTCEG score recompute
  8. 2026-09-13 23:56 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  9. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-09-13 08:44 UTCEG score recompute
  11. 2026-09-13 08:44 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  12. 2026-09-12 15:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-09-12 13:37 UTCEG score recompute
  14. 2026-09-12 13:37 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  15. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-09-11 09:37 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-09-10 09:34 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-09-06 14:11 UTCEG score recompute
  21. 2026-09-06 14:11 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  22. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-09-05 23:12 UTCEG score recompute
  24. 2026-09-05 23:12 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  25. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  26. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  27. 2026-09-01 13:53 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  28. 2026-09-01 04:39 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  29. 2026-08-30 21:04 UTCEG score recompute
  30. 2026-08-30 21:04 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  31. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  32. 2026-08-30 08:15 UTCEG score recompute
  33. 2026-08-30 08:15 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  34. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  35. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  36. 2026-08-27 21:59 UTCEG score recompute
  37. 2026-08-27 21:59 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  38. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  39. 2026-08-27 02:48 UTCEG score recompute
  40. 2026-08-27 02:48 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  41. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  42. 2026-08-26 13:55 UTCEG score recompute
  43. 2026-08-26 13:55 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  44. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  45. 2026-08-25 12:02 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  46. 2026-08-24 22:52 UTCEG score recompute
  47. 2026-08-24 22:52 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  48. 2026-08-24 10:03 UTCEG score recompute
  49. 2026-08-24 10:03 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  50. 2026-08-23 20:31 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  51. 2026-08-23 07:46 UTCEG score recompute
  52. 2026-08-23 07:46 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  53. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  54. 2026-08-22 19:01 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  55. 2026-08-22 06:03 UTCEG score recompute
  56. 2026-08-22 06:03 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  57. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  58. 2026-08-21 17:18 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  59. 2026-08-21 04:33 UTCEG score recompute
  60. 2026-08-21 04:33 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  61. 2026-08-20 22:55 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  62. 2026-08-20 15:48 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  63. 2026-08-20 02:30 UTCEG score recompute
  64. 2026-08-20 02:30 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  65. 2026-08-19 17:03 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  66. 2026-08-19 09:49 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  67. 2026-08-18 20:49 UTCEG score recompute
  68. 2026-08-18 20:49 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  69. 2026-08-18 13:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  70. 2026-08-18 03:48 UTCEG score recompute
  71. 2026-08-18 03:48 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  72. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  73. 2026-08-17 12:15 UTCGHSA enrichmentGHSA-hcrc-2pw3-4v88 · GitHub severity CRITICAL · GitHub CVSS 8.1
  74. 2026-08-16 23:31 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-40138?
CVE-2026-40138 is a high-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 and Privileged Remote Access. Improper validation of authentication data may allow a network-positioned attacker to bypass access controls and gain unauthorized access to the appliance,…
When was the CVE record for CVE-2026-40138 published?
The CVE record for CVE-2026-40138 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-2026-40138 actively exploited?
CVE-2026-40138 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-40138?
CVE-2026-40138 has a CVSS v3 base score of 8.1 (NVD).
How do I remediate CVE-2026-40138?
No fix for CVE-2026-40138 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-2026-40138 are linked in the Vendor Advisories panel on this page.

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