by Kastro
Paper/Archive/CVE-2026-54363

CVE-2026-54363

Gladinet CentreStack — CentreStack < 17.5 Hardcoded Key Token Forgery RCE

EPSS 0.7%CVSS 9.3
critical.is priorityof 100
38
CVSS 9.3 (CNA)9.3 / 10 × 3027.9Not in CISA KEV+300.0EPSS percentile 52.7.527 × 2010.5No public exploit+100.0SSVC exploitation: none+100.0
Description · from the CVE record

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.

Affected

ProductAffectedFixed inSource
CentreStack< 17.517.5CNA

Scores by source

VulnCheck (CNA)9.3CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
VulnCheck (CNA)9.1CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
CISA ADPSSVCExploitation: none · Automatable: yes · Technical impact: partial

References

refcentrestack.comwriteupvulncheck.com/advisories/centrestack-hardcoded-key-token-forgery-rce