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Data Breach at Byker & Associates and Vanguard Group Exposes Social Security Numbers

Data Breach at Byker & Associates and Vanguard Group Exposes Social Security Numbers

First seen 7 Nov 2026, 22:47 UTC • •
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ThreatCluster AI
ThreatCluster •November 7, 2026 at 22:47 UTC
  • •Byker & Associates reported a breach affecting 2 Vermont residents' Social Security numbers.
  • •Vanguard Group disclosed a breach impacting 94 Vermont residents' Social Security numbers.
  • •The causes of both breaches remain undisclosed, with no information on the total national impact.

Byker & Associates, Inc., an accounting firm, reported a data breach affecting Social Security numbers, with 2 Vermont residents confirmed impacted. Vanguard Group, Inc. also disclosed a breach involving Social Security numbers, affecting 94 Vermont residents. Both incidents were listed in the Vermont Attorney General's public breach notice on November 4, 2026. The specific cause of the breaches remains undisclosed, and neither company has provided details on the total number of affected individuals nationwide. The breaches highlight the risks associated with handling sensitive personal information, particularly in the financial and accounting sectors. Victims of such breaches are at risk of identity theft, as Social Security numbers are difficult to replace. The lack of detailed information about the breaches raises concerns about the overall impact and the potential for further disclosures.

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Timeline

2026-11-04
Breach notices filed with Vermont AG
Both Byker & Associates and Vanguard Group reported data breaches involving Social Security numbers affecting Vermont residents.
Classactionu
2026-11-04
Vanguard breach details published
Vanguard Group's breach notice confirmed 94 Vermont residents were affected, with Social Security numbers compromised.
Beinsure

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Common questions

How many residents were affected by each breach?
Byker & Associates reported 2 affected residents, while Vanguard Group reported 94 affected residents.
What type of information was compromised?
Both breaches involved the exposure of Social Security numbers, but further details on other data types were not disclosed.
What actions should affected individuals take?
Affected individuals should monitor their financial accounts and consider enrolling in identity theft protection services if offered.