Back to overview
Confidence MediumJun 14, 2026tinypulse.com

Nintendo Employee Data Exposed via TinyPulse Third-Party Breach, Shadowbyt3$ Shifts Ransom Demand

PatternExternal actor · Hacking · Confidentiality impact

Nintendo of America confirmed that internal employee survey data was stolen in a cyberattack targeting TinyPulse, a third-party employee engagement platform owned by WebMD Health Services. Nintendo's own systems were not compromised, and no customer or financial data was accessed. The breach was claimed by the Shadowbyt3$ extortion group, which initially demanded a $2 million ransom from Nintendo on June 12, 2026, but shifted its demand directly to TinyPulse on June 14, 2026, after Nintendo declined to engage. The claimed dataset includes employee names, email addresses, analytics, survey records, bank statement PDFs, and W-9 tax forms.

Signal date
Jun 14, 2026
Updated
Jun 29, 2026
Confidence
Medium
Sources
4 sources
tinypulse.com logo

Tinypulse

Sector
Information
Signals
1 linked

Signal context

First seen: Jun 14, 2026

Last updated: Jun 29, 2026

Status: Public signal

Key points

  • Third-party breach affecting TinyPulse, a vendor to Nintendo.
  • Nintendo employee survey data stolen.
  • Shadowbyt3$ extortion group claimed responsibility.

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
Tinypulse logo
Tinypulse

Sector: Information

Likely country: Location not provided

Estimated
Threat source
Hacking activity

The feed marks multiple actor roles. Treat this as a review signal rather than a final attribution.

  • Source type: outside the affected organization
  • Source type: possible insider or internal misuse
Business impact
Potential data exposure

Impact area: Confidentiality

Likely asset: User or customer data

Trend context
69 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
TinypulseData DisclosureShadowbyt3Shifts Ransom Demand Nintendo ofAmericaTinyPulseWebMD Health Services. NintendoNintendoPDFsW-9

External sources

Related signals

Grouped by why the signal is relevant.

nifty.com logoNiftyJun 28, 2026
Same sectorSame action patternSame 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 action patternSame 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 action patternSame 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 action patternSame 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.

jcom.co.jp logoJcomJun 28, 2026
Same sectorSame action patternSame impact area

JCOM Co., Ltd. Affected by KDDI Corporation Data Breach

JCOM Co., Ltd., 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. JCOM customers' email addresses and passwords may have been compromised.

polymarket.com logoPolymarketJun 28, 2026
Same sectorSame action patternSame impact area

Polymarket Suffers $3 Million Crypto Drain via Third-Party Vendor Compromise

Prediction market platform Polymarket disclosed a breach where hackers compromised a third-party vendor. The attackers injected malicious code into the Polymarket website for some users, leading to the draining of approximately $3 million in pUSD (USDC-backed) from at least 11 user wallets. The stolen funds were subsequently swapped and moved to Ethereum. Polymarket has contained the incident, committed to full refunds for affected users, and is in the process of notifying victims. This incident highlights supply-chain vulnerabilities in web frontends and crypto platforms.