Dropbox 2012 Data Breach
ObscureIQ Breach Intelligence
Low SeverityWebsite / service breach
Dropbox Cloud Storage Breach (2012, Disclosed 2016): 87 Million User Accounts Including Hashed Passwords Exposed
Cloud storage and file sharing service.
Verified by ObscureIQ Intelligence
23/100Breach Risk Index
5Data Value
25Market Recency
512dSince Breach
Breach Intelligence Summary
Entity: Dropbox · Actor: Unknown · Sources: 10 references
Attack: Misconfiguration
Profile: Platform · Cloud storage and file sharing · SaaS collaboration platform · Global
Timeline: Breach (2012-07-01) · Indexed (Dec 01, 2024) · Year (2012)
Exposure: 87.3M records · 2 fields: Email Address, Password
Status: Confirmed
Executive Summary
Dropbox, the cloud storage and file-sharing platform, suffered a breach in mid-2012 after attackers obtained employee credentials and used them to access an internal document containing user email addresses. The incident exposed data belonging to tens of millions of customers. The full scale only became clear in August 2016, when a dataset of over 68 million records appeared for trade online, prompting Dropbox to force password resets for users it believed were at risk. The exposed data included email addresses and salted password hashes. Approximately half used the SHA-1 algorithm and half used bcrypt, a stronger hashing method. While hashed passwords are not plaintext, they can be cracked with enough computing effort, particularly the SHA-1 portion. Anyone who reused their Dropbox password on other services faced a heightened risk of account takeover across those platforms. No major regulatory action was publicly reported in connection with this breach. The four-year gap between the 2012 incident and the 2016 disclosure means many affected users had no opportunity to act promptly. For those affected, the primary ongoing risk is credential reuse: if the same email and password combination was used elsewhere, those accounts may still be vulnerable. Checking for reused passwords and enabling two-factor authentication on accounts tied to the exposed email address remains advisable.
ObscureIQ assessment: High risk of credential reuse, account takeover, and unauthorized access to linked file ecosystems. The platform’s central role in document storage increases downstream exposure beyond the initial breach.
Breach Impact
The 2012 Dropbox breach became a major long-tail credential exposure because the data did not fully surface until years later. Public breach tracking says more than 68 million records were traded online and included email addresses plus salted password hashes, and Dropbox responded in 2016 by forcing password resets for users it believed were at risk. That made the breach highly useful for password cracking, credential stuffing, account takeover attempts, and cross-platform compromise wherever users had reused passwords.
About Dropbox
Dropbox is a cloud storage and collaboration company whose core business centers on file sync, sharing, backup, and workflow tools for individuals and organizations. Over time it has expanded beyond storage into broader productivity and content-management services, including Dash, DocSend, and Dropbox Sign, positioning itself as infrastructure for modern work rather than just a file locker.
Why They Hold Your Data
Cloud storage and collaboration platforms collect emails, usernames, passwords, device-linked access data, and sharing records tied to personal and organizational file storage.
Recent Developments
Dropbox’s recent public strategy has focused on AI-enabled knowledge work and workflow expansion. In 2025 and early 2026, the company emphasized growth around Dropbox Dash, deeper product integration, and investment in AI tools for work, while also telling investors it was strengthening its core file-sync-and-share foundation and accelerating Dash as a major future growth area.
Data Points Exposed
2 verified field types
Email Address
Password Critical
Field names are shown in full for clarity and search visibility. Canonical machine keys are emitted only in this page’s structured data.
Exploitation & Downstream Threats
Threat Activity:High
Primary downstream threats:
- Credential stuffing against reused passwords across other platforms
- Targeted phishing campaigns using exposed email addresses
Threat vectors:
- Phishing, credential stuffing & account takeover
- Credential stuffing & account takeover
Recommended Actions
If you believe your information may be included:
Change Reused Passwords
Update this account and anywhere you reused the password; use a manager.
Enable MFA Everywhere
Turn on multi-factor authentication on email first, then financial accounts.
Report & Recover
If you spot misuse, start an official recovery plan and report fraud.
Frequently Asked Questions
What happened in the Dropbox breach?▾
Dropbox, the cloud storage and file-sharing platform, suffered a breach in mid-2012 after attackers obtained employee credentials and used them to access an internal document containing user email addresses. The incident exposed data belonging to tens of millions of customers. The full scale only…
What data was exposed?▾
Verified fields include Email Address, Password.
What should I do if I was affected?▾
Change reused passwords, enable MFA, and (if identity or financial data is involved) freeze your credit and monitor your accounts.
Sources & References
Every claim on this page is traceable. This breach draws on:
Breach Index
Breach Index
Cross-source
9ghz
Cross-source
BreachAware
Cross-source
BreachForums_Official_Index
Cross-source
DataViper.io
Cross-source
Dehashed
Cross-source
Hashes.org
Cross-source
LeakBase.pw
ObscureIQ Intelligence
ObscureIQ proprietary analysis
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