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Recent Breaches › A10NETWORKS.COM Listed by clop Ransomware Group

HIGH severityUnverified claimHow we verify

A10NETWORKS.COM Listed by clop Ransomware Group: Ransomware Claim — What’s Alleged & What To Do

RBRecent Breaches Breach Intelligence·November 21, 2025
A10NETWORKS.COM Listed by clop Ransomware Group

Reported November 21, 2025.

HIGH
Severity
November 21, 2025
Disclosed
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A10NETWORKS.COM was listed by the Clop ransomware group on November 21, 2025, with internal files reported to have been exfiltrated in the attack; the number of individuals affected and the precise date of the intrusion remain undisclosed. People who have an account or relationship with the organization should review any notices from A10 Networks and change passwords or enable additional security measures if advised.

Severity & verification
HIGH severityUnverified claim
Data types not itemised.
Published on a ransomware group’s leak site — an unverified extortion claim until the named organization or credible reporting corroborates it.
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A10 Networks was listed on November 21, 2025, by the Clop ransomware group, which claims to have exfiltrated internal files from the company. Public information on the number of people affected, the volume of data, or confirmation of any subsequent release remains unavailable.

Breaking down the breach

The only confirmed public detail is the listing itself on the reported date. No information has been released on how the access occurred, how long the actors may have been present, or whether encryption was deployed in addition to the claimed exfiltration. The number of files or records involved has not been stated, and the organization has not issued a statement confirming or disputing the claim.

Inside clop

Clop is a ransomware group that has conducted multiple operations against large organizations since at least 2019. Its typical pattern involves initial network access, often through known vulnerabilities or compromised credentials, followed by data collection and encryption. The group maintains a leak site where it lists victims and, in some cases, publishes samples of data. Listings on the site constitute claims by the group rather than independently verified events.

A10NETWORKS.COM and its sector

A10 Networks supplies network infrastructure and security products, including load balancing, application delivery, DDoS protection, and SSL inspection tools. These solutions are used by enterprises and service providers to manage traffic and protect availability. Organizations in this sector routinely hold customer configuration data, internal network diagrams, support records, and product-related intellectual property.

What was likely exposed

The listing refers only to “internal files exfiltrated in ransomware attack.” No inventory of specific data categories has been published. Organizations of this type commonly store customer account information, contract details, technical documentation, and employee records, but the exact contents of any exfiltrated material remain unconfirmed.

Why it matters

Exposure of internal technical files can reveal details about a company’s own security controls and customer environments. Where customer or employee records are involved, the primary risks are targeted follow-on phishing or account takeover attempts. The absence of confirmed data volumes means the scale of any downstream impact cannot yet be assessed.

Were you affected?

Individuals who have interacted with A10 Networks as customers or partners should monitor official communications from the company. A practical first step is to review recent account activity for any services that may have been supplied or supported by the organization. Readers can also run a free exposure scan of their email address against known breach datasets to check for prior appearances of their information.

AICompiled with AI assistance from public sources and published under our editorial standards.

Editorial & sourcing policy
Recent Breaches is a breach-monitoring service and news aggregator. We do not exfiltrate, host, purchase, or redistribute stolen data, and we do not hold the data claimed in leak-site listings. Incidents are compiled from publicly accessible sources and threat-intelligence platforms and are reported as claims attributed to their source. We promptly correct or remove material shown to be inaccurate — write to support@galaxywarden.com or press@recentbreaches.com.
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How this breach connects

Company

Attributed to

Method

CompanyA10NETWORKS.COM security record
84/100
DoxxScan™ · Low doxx risk
B- 76Above-average record

1 reported incident on record.

See A10NETWORKS.COM’s full breach history →

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Source: threat-actor leak-site listing

Publicly posted by clop — unverified claim, pending independent verification

Breach listings — particularly those originating from ransomware or leak sites — are third-party claims that may be unverified, incomplete, or inaccurate. A listing does not by itself confirm that a breach occurred or that any specific data was exposed. Severity is an automated assessment, not a definitive rating. Verification status is shown where available.

Attributions to threat groups and methods reflect public reporting and, in some cases, unverified claims made by the groups themselves; they may be incomplete or later revised. Recent Breaches and GalaxyWarden are independent and are not affiliated with, and do not endorse, any company or group named on this page. This information is aggregated from public sources for awareness only and is not legal, security, or investment advice.

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