Find notable cyber news and cases, enriched with sources, timelines, and signals.
Home Browse News Feed Stats Watchlists Beta About Contact

US District Court for the Eastern District of Texas complaint filed seeking damages against SonicWall on vendor-liability exposure over a cyber breach

Regulatory/Legal Action
First reported
Last updated
Happening score
H score 21
1 unique sources, 1 articles

Summary

Hide ▲

Marquis filed a federal complaint in US District Court for the Eastern District of Texas against SonicWall, seeking damages over a data breach it says the vendor enabled. The case turns a third-party compromise into vendor-liability litigation, raising the stakes for security suppliers and their customers. It matters because disputes over breach blame and recovery costs can reshape how organizations assign responsibility after cyber incidents.

Related Happenings

Marquis data breach exposing 672,075 people's personal and financial information

Data Leak
First: 18.03.2026 17:32 Last: 18.03.2026 17:32 Sources 1

About this happening: Marquis disclosed a **data breach** that exposed personal and financial records tied to **672,075 people**, increasing the risk of identity theft and account fraud. The stolen inf...

Open Happening

CJEU PSD2 refund opinion for phishing victims

Regulatory/Legal (General)
First: 08.03.2026 17:25 Last: 08.03.2026 17:25 Sources 1

About this happening: The **CJEU Advocate General** issued a formal **PSD2 opinion** that could force banks to **refund unauthorized transactions immediately**, changing reimbursement handling for **ph...

Open Happening

Marquis Software Solutions lawsuit against SonicWall over cybersecurity failures

Regulatory/Legal Action
First: 25.02.2026 17:54 Last: 25.02.2026 17:54 Sources 1

About this happening: Marquis Software Solutions filed a lawsuit against **SonicWall**, alleging **gross negligence** and **misrepresentation** tied to a **ransomware attack** that disrupted operations...

Open Happening

Peter Williams sentencing in zero-day theft case

Law Enforcement
First: 25.02.2026 10:21 Last: 25.02.2026 10:21 Sources 1

About this happening: Peter Williams, a former L3Harris/Trenchant employee, was sentenced to roughly seven years in prison after pleading guilty to stealing and selling at least eight zero-day exploits...

Latest development: 25.02.2026 10:49

Peter Williams, a former L3Harris employee, is sentenced to a little over seven years in prison, three years of supervised release, and forfeiture of illicit proceeds after pleading guilty in October 2025 to stealing and selling eight zero-day exploits to Operation Zero in exchange for up to $4 million in cryptocurrency.

Open Happening

Marquis Software Solutions hit by ransomware attack

Incident
First: 29.01.2026 19:57 Last: 29.01.2026 19:57 Sources 1

How related: On Aug. 14, a ransomware actor gained access to Marquis's IT network and client data, including personally identifying information (PII) belonging to customers of some of its clients.

About this happening: **Marquis Software Solutions** disclosed that its **August 14, 2025** ransomware attack exposed personal data tied to **74 U.S. banks and credit unions** and affected **over 400,0...

Latest development: 18.03.2026 17:32

Marquis, a Texas-based financial services provider, disclosed that a ransomware gang stole personal and financial data from 672,075 people after an August 14, 2025 attack on a compromised SonicWall firewall, and the incident disrupted operations at 74 banks across the United States; breach notifications were filed in early December, and affected files were reviewed on December 10, 2025.

Open Happening

Timeline

  1. 27.02.2026 00:02 1 articles · 2mo ago

    Ransomware actor accesses Marquis network and client data

    Exploitation Observed

    A ransomware actor gained access to Marquis's IT network on Aug. 14, exposing client data that included personally identifying information (PII) belonging to customers of some of Marquis's clients.

    Show sources
    Open in new tab
  2. 27.02.2026 00:02 1 articles · 2mo ago

    SonicWall discloses breach of customer firewall backup files

    Initial Disclosure

    SonicWall said it had fallen victim to its own breach and disclosed that attackers had accessed customers' firewall configuration backup files, creating conditions for follow-on attacks against those customers.

    Show sources
    Open in new tab
  3. 27.02.2026 00:02 1 articles · 2mo ago

    SonicWall expands impact claim to all customers

    Campaign Scope Update

    SonicWall later admitted that all of its customers were impacted, revising an earlier claim that only 5% of customers were affected.

    Show sources
    Open in new tab
  4. 27.02.2026 00:02 2 articles · 2mo ago

    Marquis files federal complaint against SonicWall

    Legal Policy Action Update

    Marquis filed a complaint in the US District Court for the Eastern District of Texas against SonicWall, blaming the firewall vendor for the breach and seeking damages.

    Show sources
    Open in new tab