How Secure Is Your Cell Phone Provider? | UpGuard
ID: 4ecbf691-bf0a-5027-b419-60e01abbbb07
STIX ID: report--4ecbf691-bf0a-5027-b419-60e01abbbb07
Feed Name: UpGuard Blog
Threat Score
UpGuard scanned ten major telecom providers and produced CSTAR security scores (average 533/950), finding systemic weaknesses: many main websites lacked sitewide SSL, numerous domains lacked email authentication (SPF/DMARC) and DNSSEC, and some providers had prior breaches (e.g., AT&T ~280k, T‑Mobile/Experian ~15M, Verizon ~1.5M) illustrating the real-world impact of these deficiencies; recommendations center on implementing sitewide SSL, email authentication, and DNS protections to reduce exposure.
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