CVE-2026-54363

CRITICALPre-NVD 9.19.1—
EchelonGraph scoreMEDIUM confidence

Score 9.1 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-30. the CNA's CVSS baseline 9.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Trending — 3 sources updated this week
9.1EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.1Exploit: None knownExposed: 0

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

CentreStack before 17.5 contains a hardcoded cryptographic key vulnerability that allows unauthenticated attackers to forge arbitrary encrypted tokens by exploiting a static SysNumber value used as entropy for AccessTicket.Encrypt() and AccessTicket.Decrypt() across all installations. Attackers can use the hardcoded key to craft valid x-glad-auth headers and call privileged API endpoints such as acquiretenantbackuptoken to obtain a domain administrator IdentityTicket, enabling a complete unauthenticated remote code execution chain.

CVSS v3
9.1
EG Score
9.1(medium)
EG Risk
56(Track)
EG Risk 56/100SSVC: 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
Severity91% × 45%
Exploitation0% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
33%
KEV
Not listed

Published

July 30, 2026

Last Modified

August 14, 2026

Advisory Details (2)

Auto-updated Sep 16, 2026
No patch confirmed yet.
generic

CentreStack < 17.5 Hardcoded Key Token Forgery RCE | Advisories | VulnCheck

https://www.vulncheck.com/advisories/centrestack-hardcoded-key-token-forgery-rce
generic

CentreStack: Grow Your MSP with Your Branded File Solution

https://www.centrestack.com/

Vendor Advisories for CVE-2026-54363(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 38× in last 7d / 166× 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 341 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-54363?
CVE-2026-54363 is a critical vulnerability published on July 30, 2026. CentreStack before 17.5 contains a hardcoded cryptographic key vulnerability that allows unauthenticated attackers to forge arbitrary encrypted tokens by exploiting a static SysNumber value used as entropy for AccessTicket.Encrypt() and AccessTicket.Decrypt() across all installations. Attackers can…
When was CVE-2026-54363 disclosed?
CVE-2026-54363 was first published in the National Vulnerability Database on July 30, 2026, with the most recent update on August 14, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-54363 actively exploited?
CVE-2026-54363 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 66.6% of all scored CVEs.
What is the CVSS score of CVE-2026-54363?
CVE-2026-54363 has a CVSS v4.0 base score of 9.1 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-54363?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-54363, 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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