Critical
CVSS 10.0 Broken Authentication Responsible Disclosure
Disclosure
[vendor] - Full Account Takeover Chain (End-to-End Proof)
Target: [vendor] / [vendor] Classification: CRITICAL (CVSS 10.0) Attack Type: Full Account Takeover Chain (Password Reset OTP Brute-Force + No Email Change OTP + JWT Over-Expiry)
- Target
- Crypto Payment Processor
- Category
- Broken Authentication
- Channel
- Responsible Disclosure
- Disclosed
- 2026-04
Redaction note
Vendor identity withheld.
This finding is documented here as part of MemCyber’s public disclosure record. The vendor has been anonymized to a sector and region descriptor. Full technical detail — including root cause, reproducible proof-of-concept, remediation guidance, and vendor attribution where granted — is available to qualified prospects under NDA.
Coordinated disclosure
How we handled it.
- Reported to the vendor via Responsible Disclosure with a reproducible proof-of-concept.
- Triage + remediation window coordinated with the vendor security team.
- Fix verified before any public reference.
- This record published only after the embargo period closed.