Critical
CVSS 9.8 Broken Authentication Responsible Disclosure
Disclosure
Eski PIN sorulmadi (dogrudan yeni PIN set ediliyor)
curl -s -X POST "https://grpc-global-service-web-envoy.use[vendor]/business_banking.backend.protos.global.proto.KycManagementService/FetchAllKycLevels" \ -H "Content-Type: application/grpc-web-text" \ -H "Accept: application/grpc-web-text" \ -H "X-Grpc-Web: 1" \ -d 'AAAAAAA='
- Target
- African Payment Processor
- Category
- Broken Authentication
- Channel
- Responsible Disclosure
- Disclosed
- 2026-03
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.