1
Published signals
currently linked to this company
Company intelligence
Kddi Web cybersecurity incidents and threat signals
kddi-web.com
This company page brings together public reporting currently associated with Kddi Web. It reflects signals published by Shadow Tier and should not be read as a complete incident history.
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0
Last 28 days
recent published signals
1
Last 90 days
recent published signals
0
High or critical
confidence classifications
June 29, 2026
Latest report
most recent published signal
Company signals
All published signals involving Kddi Web
KDDI Web Communications Customer Data Affected by KDDI Email System Breach
KDDI Web Communications, a subsidiary of KDDI, was impacted by the data breach in KDDI Corporation's email system, disclosed on June 28, 2026. The incident, caused by a third-party software vulnerability, led to the potential exposure of up to 14.2 million email addresses and passwords belonging to customers across six Japanese ISPs, including KDDI Web Communications.
FAQ
Questions about Kddi Web cybersecurity reporting
What does the Kddi Web page include?
It combines a reviewed organization profile with all current published Shadow Tier signals explicitly linked to Kddi Web.
Does every mention of Kddi Web appear here?
No. A signal must contain a reliable company connection and meet the publication criteria; incidental or ambiguous mentions are excluded.
Why can the incident count change?
The page follows current published reporting. Counts change as new evidence is added, classifications are reviewed, or older signals leave the reporting window.