People search Malwarebytes data breach timeline because the brand sits on billions of accounts, credentials, and cloud workloads. BreachHistory indexes 1 Malwarebytes-linked incident. This page maps every attested event through 2026 with internal links to canonical records.
Why Malwarebytes breach history matters
Malwarebytes operates in Technology (United States). Across indexed rows, recurring themes include third-party and supply-chain exposure, zero-day exploitation and malware. Understanding the chronological pattern helps security teams, customers, and regulators separate confirmed disclosures from forum marketing.
Full timeline through 2026
2021 — nation-state intrusion via privileged cloud apps (SolarWinds-era reporting)
Cataloged incident. Malwarebytes disclosed evidence of unauthorized access to a limited subset of internal company emails after Microsoft notified the company of suspicious activity tied to third-party applications with privileged Mailgun access; Malwarebytes published a detailed technical post describing investigation scope. Exposed categories include Selected internal O365 email content and operational metadata described in Malwarebytes’ public reporting. No attested victim count is published for this row yet. See the malwarebytes2021man5 and canonical BreachHistory entry.
Patterns and analysis
- Third-party and supply-chain exposure — appears across multiple Malwarebytes catalog entries; prioritize controls that address this class of failure.
- Zero-day exploitation and malware — appears across multiple Malwarebytes catalog entries; prioritize controls that address this class of failure.
- Record-count hygiene — BreachHistory indexes actor-cited figures separately from company-confirmed totals; read each row's technicalWriteup before treating counts as fact.
- 2026 monitoring — New disclosures roll into this timeline as they are verified or labeled unverified per catalog policy.
What to do if you may be affected
- Step 1: Enable phishing-resistant MFA on every account tied to this brand.
- Step 2: Use unique passwords and a password manager—breach rows often involve credential reuse.
- Step 3: Monitor official company breach notices and regulator filings, not dark-web downloads.
- Step 4: Review OAuth app permissions and revoke unused third-party integrations.
- Step 5: Bookmark the Malwarebytes company page for new 2026+ disclosures.
Canonical BreachHistory hub
Explore every indexed row: breachhistory.com/malwarebytes · Latest: malwarebytes2021man5.
Sources: BreachHistory catalog (1 row for Malwarebytes), company and regulator disclosures cited in individual breach records.