High
CVSS 8.1 Subdomain Takeover Responsible Disclosure
Disclosure
Wildcard DNS + CORS Reflection Enhances Phishing-to-ATO
Wildcard DNS resolves every subdomain to single IP, combined with permissive CORS chains into ATO.
- Target
- African Fintech Remittance
- Category
- Subdomain Takeover
- 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.