Back to overview
Kloecknermetals logo
kloecknermetals.com
Kloecknermetals
Confidence MediumMar 13, 2026kloecknermetals.com

Kloeckner Metals Corporation Discovers Data Breach Exposing Names and Social Security Numbers

PatternExternal actor · Hacking · Confidentiality impact

Kloeckner Metals Corporation discovered on March 13, 2026, that files containing names and Social Security numbers were compromised. The security incident involved unauthorized access to their network between February 17, 2026, and February 23, 2026, during which copies of certain files were taken. The company identified unusual activity on February 23, 2026, and initiated an investigation with cybersecurity experts.

Signal date
Mar 13, 2026
Updated
Jun 25, 2026
Confidence
Medium
Sources
2 sources
kloecknermetals.com logo

Kloecknermetals

Sector
Professional, Scientific, and Technical Services
Signals
1 linked

Signal context

First seen: Mar 13, 2026

Last updated: Jun 25, 2026

Status: Public signal

Key points

  • Discovery of compromised files on March 13, 2026.
  • Unauthorized network access occurred between February 17-23, 2026.
  • Compromised data included names and Social Security numbers.

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
Kloecknermetals logo
Kloecknermetals

Sector: Professional, Scientific, and Technical Services

Likely country: 🇺🇸 United States

inferred from source domains

    Estimated
    Threat source
    Hacking activity

    Watch internet-facing systems, credential abuse and exploit activity.

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

    Impact area: Confidentiality

    Likely asset: User or customer data

    Trend context
    69 signals with similar action pattern
    • 5 signals in the same sector
    • 90 signals with the same likely impact area
    • 1 signal linked to this organization/domain
    Mentioned entities
    KloecknermetalsData DisclosureKloeckner Metals Corporation Discovers DataSecurity Numbers Kloeckner Metals CorporationDiscovery ofUnauthorizedCompromised

    External sources

    Related signals

    Grouped by why the signal is relevant.

    fortinet.com logoFortinetJun 22, 2026
    Same sectorSame action patternSame impact area

    Fortinet FortiBleed Credential Exposure

    A significant security incident, dubbed 'FortiBleed,' led to the exposure of tens of thousands of Fortinet firewall and VPN credentials. SOCRadar detected 30,000 compromised Fortinet firewalls, prompting the U.S. Cybersecurity and Infrastructure Security Agency (CISA) to issue an alert urging organizations to harden their Fortinet devices against brute-force and credential-stuffing activities.

    tweakers.net logoTweakersJun 19, 2026
    Same sectorSame action patternSame impact area

    Paywall Bypass Vulnerability

    Tweakers.net has identified a vulnerability that allows for the bypass of its paywall. This issue is listed as a 'Known issue' within their bug bounty program, indicating that the company is aware of the flaw and is seeking ethical hackers to report findings related to it. A successful bypass could allow unauthorized access to premium content.

    servicenow.com logoServicenowJun 5, 2026
    Same sectorSame action patternSame impact area

    ServiceNow Discloses Security Incident Exploiting Unauthenticated Access Flaw

    ServiceNow warned of a security incident where unknown threat actors exploited an unauthenticated access flaw through a vulnerable API endpoint to gain unauthorized access and query data from customer instances. Malicious activity commenced on June 2, 2026, with customers reporting the issue via bug bounty programs on June 3-4, 2026. ServiceNow applied a security update to hosted customer instances on June 5, 2026, to remediate the vulnerability and limit access to authenticated users. A subset of customer instances was successfully queried.

    nifty.com logoNiftyJun 28, 2026
    Same 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 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 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.