Back to overview
Confidence MediumMay 22, 2026acm.nl

Dutch civil servants from Authority for Consumers and Markets (ACM) affected by Microsoft data leak

PatternExternal actor · Error · Confidentiality impact

Names of civil servants from the Authority for Consumers and Markets (ACM), involved in implementing the Digital Services Act (DSA), were reportedly shared by Microsoft with the U.S. House of Representatives without redaction.

Signal date
May 22, 2026
Updated
Jun 24, 2026
Confidence
Medium
Sources
1 source
acm.nl logo

Acm

Domain
acm.nl
Sector
Information
Signals
1 linked

Signal context

First seen: May 22, 2026

Last updated: Jun 24, 2026

Status: Public signal

Key points

  • Names of Dutch civil servants from ACM leaked.
  • Involved in Digital Services Act (DSA) implementation.
  • Data shared by Microsoft with U.S. House of Representatives.

Signal analysis

Beta

This analysis groups the signal by industry, likely incident action and impacted security area. It helps compare this signal with other published signals without treating the labels as final determinations.

Affected organization
Acm logo
Acm

Sector: Information

Likely country: 🇳🇱 Netherlands

inferred from company domain

    Estimated
    Threat source
    Error activity

    Watch process controls, misconfiguration and accidental disclosure paths.

    • Source type: outside the affected organization
    Business impact
    Potential data exposure

    Impact area: Confidentiality

    Trend context
    12 signals with similar action pattern
    • 26 signals in the same sector
    • 90 signals with the same likely impact area
    • 1 signal linked to this organization/domain
    Mentioned entities
    AcmSuspected Data ExposureDutchAuthority for Consumers and MarketsACMMicrosoftNames ofDigital Services ActDSAU.S. House of Representatives

    External sources

    Related signals

    Grouped by why the signal is relevant.

    jeveuxaider.gouv.fr logoJeveuxaiderJun 16, 2026
    Same sectorSame action patternSame impact area

    Jeveuxaider.gouv.fr Data Leak Affects 550,000 Accounts

    The French government announced on June 16, 2026, that its volunteering platform, Jeveuxaider.gouv.fr, had been a victim of a personal data leak. Approximately 550,000 user accounts were affected by the incident.

    chipsoft.nl logoChipsoftJun 12, 2026
    Same sectorSame action patternSame impact area

    Dutch hospitals restore digital access after cyberattack on ChipSoft

    On June 12, 2026, reports indicated that Dutch hospitals were restoring digital access following a cyberattack on ChipSoft, a major healthcare software provider. The attack had previously caused patient files to become inaccessible at multiple locations, leading fifteen hospitals to preventively block all electronic patient information. This measure forced doctors to revert to paper records and oral transfers. While the incident was not a data leak in the traditional sense, it was a significant attack on the health infrastructure of the Netherlands, carried out through a single supplier serving numerous hospitals.

    nifty.com logoNiftyJun 28, 2026
    Same sectorSame impact area

    NIFTY Corporation Affected by KDDI Corporation Data Breach

    NIFTY Corporation, a Japanese internet service provider, was impacted by a data breach originating from an email system provided by KDDI Corporation. Threat actors gained unauthorized access to this shared system by exploiting a vulnerability in third-party software. This led to the potential exposure of up to 14.2 million email addresses and passwords across all affected ISPs. NIFTY Corporation customers' email addresses and passwords may have been compromised.

    biglobe.ne.jp logoBiglobeJun 28, 2026
    Same sectorSame impact area

    BIGLOBE Inc. Affected by KDDI Corporation Data Breach

    BIGLOBE Inc., a Japanese internet service provider, was impacted by a data breach originating from an email system provided by KDDI Corporation. Threat actors gained unauthorized access to this shared system by exploiting a vulnerability in third-party software. This led to the potential exposure of up to 14.2 million email addresses and passwords across all affected ISPs. BIGLOBE Inc. customers' email addresses and passwords may have been compromised.

    stnet.co.jp logoStnetJun 28, 2026
    Same sectorSame impact area

    STNet, Inc. Affected by KDDI Corporation Data Breach

    STNet, Inc., a Japanese internet service provider, was impacted by a data breach originating from an email system provided by KDDI Corporation. Threat actors gained unauthorized access to this shared system by exploiting a vulnerability in third-party software. This led to the potential exposure of up to 14.2 million email addresses and passwords across all affected ISPs. STNet customers' email addresses and passwords may have been compromised.

    kddi-web.com logoKddi WebJun 28, 2026
    Same sectorSame impact area

    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.