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JAENES
SPossible leakOctober 12, 2026 announced

あっぷらぼ（メールサービス）Data breach / unauthorized access incident

笹尾 祐太朗の写真Reviewed by Yutaro SasaoWritten by Leak Watch editorial team published ・ updated
Occurred on
Unconfirmed
Announced on
October 12, 2026
Severity
SCompromise of deep personal data or usable credentials.
Scale
Unknown
Main impact
The mail server's administrative password was compromised, and some email addresses and encrypted password data may have been accessed; users have been asked to change their passwords. The number of affected records has not been disclosed.
Information involved
Email addressPassword
Cause / key point
Insufficient access restrictions on the administrative connection route.
Industry
IT & telecom
Listing / capital
Unlisted
Sources
Last updated
October 20, 2026
Email addressPasswordHow severity is assessed →

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Written & reviewed

笹尾 祐太朗の写真

Reviewed byYutaro SasaoFounder & CEO, MediaLeap Inc.

CEO of MediaLeap Inc. Working on both sides of web advertising and web media since 2013; founded the company in May 2025.

Review scope: cross-checking against primary sources (official and government announcements), verifying claims stay within the facts, and checking source attribution。Last reviewed:

Written by:Leak Watch editorial team (AI-assisted drafts verified against sources by the editorial team) · Reviewer profile · Request a correction

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Attack method classification: Under investigation / not stated(Cause not disclosed)

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